fix: fix gh codeql review

go.mod

@@ -152,6 +152,7 @@ require (
 	go.opentelemetry.io/otel/sdk v1.43.0 // indirect
 	go.opentelemetry.io/otel/sdk/metric v1.43.0 // indirect
 	go.opentelemetry.io/otel/trace v1.43.0 // indirect
+	go.uber.org/dig v1.19.0 // indirect
 	go.yaml.in/yaml/v2 v2.4.3 // indirect
 	go4.org/mem v0.0.0-20240501181205-ae6ca9944745 // indirect
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba // indirect

go.sum

@@ -485,6 +485,8 @@ go.opentelemetry.io/otel/trace v1.43.0 h1:BkNrHpup+4k4w+ZZ86CZoHHEkohws8AY+WTX09
 go.opentelemetry.io/otel/trace v1.43.0/go.mod h1:/QJhyVBUUswCphDVxq+8mld+AvhXZLhe+8WVFxiFff0=
 go.opentelemetry.io/proto/otlp v1.10.0 h1:IQRWgT5srOCYfiWnpqUYz9CVmbO8bFmKcwYxpuCSL2g=
 go.opentelemetry.io/proto/otlp v1.10.0/go.mod h1:/CV4QoCR/S9yaPj8utp3lvQPoqMtxXdzn7ozvvozVqk=
+go.uber.org/dig v1.19.0 h1:BACLhebsYdpQ7IROQ1AGPjrXcP5dF80U3gKoFzbaq/4=
+go.uber.org/dig v1.19.0/go.mod h1:Us0rSJiThwCv2GteUN0Q7OKvU7n5J4dxZ9JKUXozFdE=
 go.uber.org/mock v0.6.0 h1:hyF9dfmbgIX5EfOdasqLsWD6xqpNZlXblLB/Dbnwv3Y=
 go.uber.org/mock v0.6.0/go.mod h1:KiVJ4BqZJaMj4svdfmHM0AUx4NJYO8ZNpPnZn1Z+BBU=
 go.yaml.in/yaml/v2 v2.4.3 h1:6gvOSjQoTB3vt1l+CU+tSyi/HOjfOjRLJ4YwYZGwRO0=

internal/bootstrap/app_bootstrap.go

@@ -18,6 +18,7 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/steveiliop56/ding"
+	"go.uber.org/dig"
 
 	"github.com/tinyauthapp/tinyauth/internal/model"
 	"github.com/tinyauthapp/tinyauth/internal/repository"
@@ -56,6 +57,7 @@ type BootstrapApp struct {
 	db        *sql.DB
 	ding      *ding.Ding
 	listeners []Listener
+	dig       *dig.Container
 }
 
 func NewBootstrapApp(config model.Config) *BootstrapApp {
@@ -70,7 +72,11 @@ func (app *BootstrapApp) Setup() error {
 	app.ctx = ctx
 	app.cancel = cancel
 
-	// Create a ding instance
+	// create the dig container
+	c := dig.New()
+	app.dig = c
+
+	// create a ding instance
 	dg := ding.New(ctx)
 	app.ding = dg
 
@@ -211,6 +217,33 @@ func (app *BootstrapApp) Setup() error {
 	// store
 	app.queries = store
 
+	// provide basic utilities to container
+	type utilityProvider struct {
+		dig.Out
+
+		Log     *logger.Logger
+		Config  *model.Config
+		Runtime *model.RuntimeConfig
+		Ding    *ding.Ding
+		Ctx     context.Context
+		Queries repository.Store
+	}
+
+	err = app.dig.Provide(func() utilityProvider {
+		return utilityProvider{
+			Log:     app.log,
+			Config:  &app.config,
+			Runtime: &app.runtime,
+			Ding:    app.ding,
+			Ctx:     app.ctx,
+			Queries: app.queries,
+		}
+	})
+
+	if err != nil {
+		return fmt.Errorf("failed to provide utilities to container: %w", err)
+	}
+
 	// services
 	err = app.setupServices()
 

internal/bootstrap/router_bootstrap.go

@@ -13,6 +13,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/controller"
 	"github.com/tinyauthapp/tinyauth/internal/middleware"
 	"github.com/tinyauthapp/tinyauth/internal/model"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 )
@@ -40,31 +41,119 @@ func (app *BootstrapApp) setupRouter() error {
 		}
 	}
 
-	contextMiddleware := middleware.NewContextMiddleware(app.log, app.runtime, app.services.authService, app.services.oauthBrokerService, app.services.tailscaleService)
-	engine.Use(contextMiddleware.Middleware())
-
-	uiMiddleware, err := middleware.NewUIMiddleware()
+	err := app.dig.Provide(middleware.NewContextMiddleware)
 
 	if err != nil {
-		return fmt.Errorf("failed to initialize UI middleware: %w", err)
+		return fmt.Errorf("failed to provide context middleware: %w", err)
 	}
 
-	engine.Use(uiMiddleware.Middleware())
+	err = app.dig.Provide(middleware.NewUIMiddleware)
 
-	zerologMiddleware := middleware.NewZerologMiddleware(app.log)
+	if err != nil {
+		return fmt.Errorf("failed to provide ui middleware: %w", err)
+	}
 
-	engine.Use(zerologMiddleware.Middleware())
+	err = app.dig.Provide(middleware.NewZerologMiddleware)
 
-	apiRouter := engine.Group("/api")
+	if err != nil {
+		return fmt.Errorf("failed to provide zerolog middleware: %w", err)
+	}
 
-	controller.NewContextController(app.log, app.config, app.runtime, apiRouter)
-	controller.NewOAuthController(app.log, app.config, app.runtime, apiRouter, app.services.authService)
-	controller.NewOIDCController(app.log, app.services.oidcService, app.runtime, apiRouter, &engine.RouterGroup)
-	controller.NewProxyController(app.log, app.runtime, apiRouter, app.services.accessControlService, app.services.authService, app.services.policyEngine)
-	controller.NewUserController(app.log, app.runtime, apiRouter, app.services.authService)
-	controller.NewResourcesController(app.config, &engine.RouterGroup)
-	controller.NewHealthController(apiRouter)
-	controller.NewWellKnownController(app.services.oidcService, &engine.RouterGroup)
+	type middlewareInput struct {
+		dig.In
+
+		ContextMiddleware *middleware.ContextMiddleware
+		UIMiddleware      *middleware.UIMiddleware
+		ZerologMiddleware *middleware.ZerologMiddleware
+	}
+
+	err = app.dig.Invoke(func(mi middlewareInput) {
+		engine.Use(mi.ContextMiddleware.Middleware())
+		engine.Use(mi.UIMiddleware.Middleware())
+		engine.Use(mi.ZerologMiddleware.Middleware())
+	})
+
+	if err != nil {
+		return fmt.Errorf("failed to invoke middleware: %w", err)
+	}
+
+	err = app.dig.Provide(func() *gin.RouterGroup {
+		return &engine.RouterGroup
+	}, dig.Name("mainRouterGroup"))
+
+	if err != nil {
+		return fmt.Errorf("failed to provide main router group: %w", err)
+	}
+
+	err = app.dig.Provide(func() *gin.RouterGroup {
+		return engine.Group("/api")
+	}, dig.Name("apiRouterGroup"))
+
+	if err != nil {
+		return fmt.Errorf("failed to provide api router group: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewContextController)
+	if err != nil {
+		return fmt.Errorf("failed to provide context controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewOAuthController)
+	if err != nil {
+		return fmt.Errorf("failed to provide oauth controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewOIDCController)
+	if err != nil {
+		return fmt.Errorf("failed to provide oidc controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewProxyController)
+	if err != nil {
+		return fmt.Errorf("failed to provide proxy controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewUserController)
+	if err != nil {
+		return fmt.Errorf("failed to provide user controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewResourcesController)
+	if err != nil {
+		return fmt.Errorf("failed to provide resources controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewHealthController)
+	if err != nil {
+		return fmt.Errorf("failed to provide health controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewWellKnownController)
+	if err != nil {
+		return fmt.Errorf("failed to provide well-known controller: %w", err)
+	}
+
+	type controllerInput struct {
+		dig.In
+
+		ContextController   *controller.ContextController
+		OAuthController     *controller.OAuthController
+		OIDCController      *controller.OIDCController
+		ProxyController     *controller.ProxyController
+		UserController      *controller.UserController
+		ResourcesController *controller.ResourcesController
+		HealthController    *controller.HealthController
+		WellKnownController *controller.WellKnownController
+	}
+
+	// force dig to build all controllers and register their routes
+	err = app.dig.Invoke(func(ci controllerInput) error {
+		return nil
+	})
+
+	if err != nil {
+		return fmt.Errorf("failed to invoke controllers: %w", err)
+	}
 
 	app.router = engine
 	return nil

internal/bootstrap/service_bootstrap.go

@@ -5,54 +5,86 @@ import (
 	"os"
 
 	"github.com/tinyauthapp/tinyauth/internal/service"
+	"go.uber.org/dig"
 )
 
 func (app *BootstrapApp) setupServices() error {
-	ldapService, err := service.NewLdapService(app.log, app.config, app.ding)
+	err := app.setupPolicyEngine()
 
 	if err != nil {
-		app.log.App.Warn().Err(err).Msg("Failed to initialize LDAP connection, will continue without it")
+		return fmt.Errorf("failed to setup policy engine: %w", err)
 	}
 
-	app.services.ldapService = ldapService
-
 	labelProvider, err := app.getLabelProvider()
 
 	if err != nil {
-		return fmt.Errorf("failed to initialize label provider: %w", err)
+		return fmt.Errorf("failed to get label provider: %w", err)
 	}
 
-	tailscaleService, err := service.NewTailscaleService(app.log, app.config, app.ctx, app.ding)
+	err = app.dig.Provide(func() service.LabelProvider {
+		return labelProvider
+	})
 
 	if err != nil {
-		app.log.App.Warn().Err(err).Msg("Failed to initialize Tailscale connection, will continue without it")
+		return fmt.Errorf("failed to provide label provider: %w", err)
 	}
 
-	app.services.tailscaleService = tailscaleService
+	err = app.dig.Provide(service.NewLdapService)
+	if err != nil {
+		return fmt.Errorf("failed to provide ldap service: %w", err)
+	}
 
-	accessControlsService := service.NewAccessControlsService(app.log, app.config, &labelProvider)
-	app.services.accessControlService = accessControlsService
+	err = app.dig.Provide(service.NewTailscaleService)
+	if err != nil {
+		return fmt.Errorf("failed to provide tailscale service: %w", err)
+	}
 
-	err = app.setupPolicyEngine()
+	err = app.dig.Provide(service.NewAccessControlsService)
+	if err != nil {
+		return fmt.Errorf("failed to provide access controls service: %w", err)
+	}
+
+	err = app.dig.Provide(service.NewOAuthBrokerService)
+	if err != nil {
+		return fmt.Errorf("failed to provide oauth broker service: %w", err)
+	}
+
+	err = app.dig.Provide(service.NewAuthService)
+	if err != nil {
+		return fmt.Errorf("failed to provide auth service: %w", err)
+	}
+
+	err = app.dig.Provide(service.NewOIDCService)
+	if err != nil {
+		return fmt.Errorf("failed to provide oidc service: %w", err)
+	}
+
+	type svcInput struct {
+		dig.In
+
+		AccessControlService *service.AccessControlsService
+		AuthService          *service.AuthService
+		LDAPService          *service.LdapService
+		OAuthBrokerService   *service.OAuthBrokerService
+		OIDCService          *service.OIDCService
+		TailscaleService     *service.TailscaleService
+	}
+
+	err = app.dig.Invoke(func(i svcInput) error {
+		app.services = Services{
+			accessControlService: i.AccessControlService,
+			authService:          i.AuthService,
+			ldapService:          i.LDAPService,
+			oauthBrokerService:   i.OAuthBrokerService,
+			tailscaleService:     i.TailscaleService,
+		}
+		return nil
+	})
 
 	if err != nil {
-		return fmt.Errorf("failed to initialize policy engine: %w", err)
+		return fmt.Errorf("failed to invoke services: %w", err)
 	}
 
-	oauthBrokerService := service.NewOAuthBrokerService(app.log, app.runtime.OAuthProviders, app.ctx)
-	app.services.oauthBrokerService = oauthBrokerService
-
-	authService := service.NewAuthService(app.log, app.config, app.runtime, app.ctx, app.ding, app.services.ldapService, app.queries, app.services.oauthBrokerService, app.services.tailscaleService, app.services.policyEngine)
-	app.services.authService = authService
-
-	oidcService, err := service.NewOIDCService(app.log, app.config, app.runtime, app.queries, app.ding)
-
-	if err != nil {
-		return fmt.Errorf("failed to initialize oidc service: %w", err)
-	}
-
-	app.services.oidcService = oidcService
-
 	return nil
 }
 
@@ -69,66 +101,93 @@ func (app *BootstrapApp) getLabelProvider() (service.LabelProvider, error) {
 		if useKubernetes {
 			app.log.App.Debug().Msg("Using Kubernetes label provider")
 
-			kubernetesService, err := service.NewKubernetesService(app.log, app.ctx, app.ding)
+			err := app.dig.Provide(service.NewKubernetesService)
 
 			if err != nil {
-				return nil, fmt.Errorf("failed to initialize kubernetes service: %w", err)
+				return nil, fmt.Errorf("failed to provide kubernetes service: %w", err)
 			}
 
-			app.services.kubernetesService = kubernetesService
-			return kubernetesService, nil
+			err = app.dig.Invoke(func(k *service.KubernetesService) error {
+				app.services.kubernetesService = k
+				return nil
+			})
+
+			if err != nil {
+				return nil, fmt.Errorf("failed to invoke kubernetes service: %w", err)
+			}
+
+			// Kubernetes will fail to initialize with an error if it cannot connect to the cluster
+			// but just to be safe, we check if the service is nil and log a warning if it is
+			if app.services.kubernetesService == nil {
+				if app.config.LabelProvider == "kubernetes" {
+					app.log.App.Warn().Msg("Kubernetes label provider selected but Kubernetes is not available, will continue without it")
+				}
+				return nil, nil
+			}
+
+			return app.services.kubernetesService, nil
 		}
 
 		app.log.App.Debug().Msg("Using Docker label provider")
 
-		dockerService, err := service.NewDockerService(app.log, app.ctx, app.ding)
+		err := app.dig.Provide(service.NewDockerService)
 
 		if err != nil {
-			return nil, fmt.Errorf("failed to initialize docker service: %w", err)
+			return nil, fmt.Errorf("failed to provide docker service: %w", err)
 		}
 
-		if dockerService == nil {
+		err = app.dig.Invoke(func(d *service.DockerService) error {
+			app.services.dockerService = d
+			return nil
+		})
+
+		if err != nil {
+			return nil, fmt.Errorf("failed to invoke docker service: %w", err)
+		}
+
+		if app.services.dockerService == nil {
 			if app.config.LabelProvider == "docker" {
 				app.log.App.Warn().Msg("Docker label provider selected but Docker is not available, will continue without it")
 			}
 			return nil, nil
 		}
 
-		app.services.dockerService = dockerService
-		return dockerService, nil
+		return app.services.dockerService, nil
 	default:
 		return nil, fmt.Errorf("invalid label provider: %s", app.config.LabelProvider)
 	}
 }
 
 func (app *BootstrapApp) setupPolicyEngine() error {
-	policyEngine, err := service.NewPolicyEngine(app.config, app.log)
+	err := app.dig.Provide(service.NewPolicyEngine)
 
 	if err != nil {
-		return fmt.Errorf("failed to initialize policy engine: %w", err)
+		return fmt.Errorf("failed to create policy engine: %w", err)
 	}
 
-	policyEngine.RegisterRule(service.RuleUserAllowed, &service.UserAllowedRule{
-		Log: app.log,
-	})
-	policyEngine.RegisterRule(service.RuleOAuthGroup, &service.OAuthGroupRule{
-		Log: app.log,
-	})
-	policyEngine.RegisterRule(service.RuleLDAPGroup, &service.LDAPGroupRule{
-		Log: app.log,
-	})
-	policyEngine.RegisterRule(service.RuleAuthEnabled, &service.AuthEnabledRule{
-		Log: app.log,
-	})
-	policyEngine.RegisterRule(service.RuleIPAllowed, &service.IPAllowedRule{
-		Log:    app.log,
-		Config: app.config,
-	})
-	policyEngine.RegisterRule(service.RuleIPBypassed, &service.IPBypassedRule{
-		Log:    app.log,
-		Config: app.config,
+	err = app.dig.Invoke(func(policyEngine *service.PolicyEngine) error {
+		policyEngine.RegisterRule(service.RuleUserAllowed, &service.UserAllowedRule{
+			Log: app.log,
+		})
+		policyEngine.RegisterRule(service.RuleOAuthGroup, &service.OAuthGroupRule{
+			Log: app.log,
+		})
+		policyEngine.RegisterRule(service.RuleLDAPGroup, &service.LDAPGroupRule{
+			Log: app.log,
+		})
+		policyEngine.RegisterRule(service.RuleAuthEnabled, &service.AuthEnabledRule{
+			Log: app.log,
+		})
+		policyEngine.RegisterRule(service.RuleIPAllowed, &service.IPAllowedRule{
+			Log:    app.log,
+			Config: app.config,
+		})
+		policyEngine.RegisterRule(service.RuleIPBypassed, &service.IPBypassedRule{
+			Log:    app.log,
+			Config: app.config,
+		})
+		return nil
 	})
 
-	app.services.policyEngine = policyEngine
-	return nil
+	return err
 }

internal/controller/context_controller.go

@@ -3,6 +3,7 @@ package controller
 import (
 	"github.com/tinyauthapp/tinyauth/internal/model"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 )
@@ -71,29 +72,33 @@ type AppContextResponse struct {
 	App     ACRApp   `json:"app"`
 }
 
-type ContextController struct {
-	log     *logger.Logger
-	config  model.Config
-	runtime model.RuntimeConfig
+type ContextControllerInput struct {
+	dig.In
+
+	Log         *logger.Logger
+	Config      *model.Config
+	Runtime     *model.RuntimeConfig
+	RouterGroup *gin.RouterGroup `name:"apiRouterGroup"`
 }
 
-func NewContextController(
-	log *logger.Logger,
-	config model.Config,
-	runtimeConfig model.RuntimeConfig,
-	router *gin.RouterGroup,
-) *ContextController {
+type ContextController struct {
+	log     *logger.Logger
+	config  *model.Config
+	runtime *model.RuntimeConfig
+}
+
+func NewContextController(i ContextControllerInput) *ContextController {
 	controller := &ContextController{
-		log:     log,
-		config:  config,
-		runtime: runtimeConfig,
+		log:     i.Log,
+		config:  i.Config,
+		runtime: i.Runtime,
 	}
 
-	if !config.UI.WarningsEnabled {
-		log.App.Warn().Msg("UI warnings are disabled. This may lead to security issues if you are not careful. Make sure to enable warnings in production environments.")
+	if !i.Config.UI.WarningsEnabled {
+		i.Log.App.Warn().Msg("UI warnings are disabled. This may lead to security issues if you are not careful. Make sure to enable warnings in production environments.")
 	}
 
-	contextGroup := router.Group("/context")
+	contextGroup := i.RouterGroup.Group("/context")
 	contextGroup.GET("/user", controller.userContextHandler)
 	contextGroup.GET("/app", controller.appContextHandler)
 

internal/controller/health_controller.go

@@ -1,15 +1,24 @@
 package controller
 
-import "github.com/gin-gonic/gin"
+import (
+	"github.com/gin-gonic/gin"
+	"go.uber.org/dig"
+)
 
 type HealthController struct {
 }
 
-func NewHealthController(router *gin.RouterGroup) *HealthController {
+type HealthControllerInput struct {
+	dig.In
+
+	RouterGroup *gin.RouterGroup `name:"apiRouterGroup"`
+}
+
+func NewHealthController(i HealthControllerInput) *HealthController {
 	controller := &HealthController{}
 
-	router.GET("/healthz", controller.healthHandler)
-	router.HEAD("/healthz", controller.healthHandler)
+	i.RouterGroup.GET("/healthz", controller.healthHandler)
+	i.RouterGroup.HEAD("/healthz", controller.healthHandler)
 
 	return controller
 }

internal/controller/oauth_controller.go

@@ -11,6 +11,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/service"
 	"github.com/tinyauthapp/tinyauth/internal/utils"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/go-querystring/query"
@@ -22,26 +23,30 @@ type OAuthRequest struct {
 
 type OAuthController struct {
 	log     *logger.Logger
-	config  model.Config
-	runtime model.RuntimeConfig
+	config  *model.Config
+	runtime *model.RuntimeConfig
 	auth    *service.AuthService
 }
 
-func NewOAuthController(
-	log *logger.Logger,
-	config model.Config,
-	runtimeConfig model.RuntimeConfig,
-	router *gin.RouterGroup,
-	auth *service.AuthService,
-) *OAuthController {
+type OAuthControllerInput struct {
+	dig.In
+
+	Log           *logger.Logger
+	Config        *model.Config
+	RuntimeConfig *model.RuntimeConfig
+	RouterGroup   *gin.RouterGroup `name:"apiRouterGroup"`
+	AuthService   *service.AuthService
+}
+
+func NewOAuthController(i OAuthControllerInput) *OAuthController {
 	controller := &OAuthController{
-		log:     log,
-		config:  config,
-		runtime: runtimeConfig,
-		auth:    auth,
+		log:     i.Log,
+		config:  i.Config,
+		runtime: i.RuntimeConfig,
+		auth:    i.AuthService,
 	}
 
-	oauthGroup := router.Group("/oauth")
+	oauthGroup := i.RouterGroup.Group("/oauth")
 	oauthGroup.GET("/url/:provider", controller.oauthURLHandler)
 	oauthGroup.GET("/callback/:provider", controller.oauthCallbackHandler)
 

internal/controller/oidc_controller.go

@@ -11,6 +11,7 @@ import (
 	"github.com/gin-gonic/gin"
 	"github.com/gin-gonic/gin/binding"
 	"github.com/google/go-querystring/query"
+	"go.uber.org/dig"
 
 	"github.com/tinyauthapp/tinyauth/internal/model"
 	"github.com/tinyauthapp/tinyauth/internal/service"
@@ -30,7 +31,7 @@ type authorizeErrorParams struct {
 type OIDCController struct {
 	log     *logger.Logger
 	oidc    *service.OIDCService
-	runtime model.RuntimeConfig
+	runtime *model.RuntimeConfig
 }
 
 type AuthorizeCallback struct {
@@ -78,22 +79,27 @@ type AuthorizeCompleteRequest struct {
 	Ticket string `json:"ticket" binding:"required"`
 }
 
-func NewOIDCController(
-	log *logger.Logger,
-	oidcService *service.OIDCService,
-	runtimeConfig model.RuntimeConfig,
-	router *gin.RouterGroup,
-	mainRouter *gin.RouterGroup) *OIDCController {
+type OIDCControllerInput struct {
+	dig.In
+
+	Log           *logger.Logger
+	OIDCService   *service.OIDCService
+	RuntimeConfig *model.RuntimeConfig
+	RouterGroup   *gin.RouterGroup `name:"apiRouterGroup"`
+	MainRouter    *gin.RouterGroup `name:"mainRouterGroup"`
+}
+
+func NewOIDCController(i OIDCControllerInput) *OIDCController {
 	controller := &OIDCController{
-		log:     log,
-		oidc:    oidcService,
-		runtime: runtimeConfig,
+		log:     i.Log,
+		oidc:    i.OIDCService,
+		runtime: i.RuntimeConfig,
 	}
 
-	mainRouter.POST("/authorize", controller.authorize)
-	mainRouter.GET("/authorize", controller.authorize)
+	i.MainRouter.POST("/authorize", controller.authorize)
+	i.MainRouter.GET("/authorize", controller.authorize)
 
-	oidcGroup := router.Group("/oidc")
+	oidcGroup := i.RouterGroup.Group("/oidc")
 	oidcGroup.POST("/authorize-complete", controller.authorizeComplete)
 	oidcGroup.POST("/token", controller.Token)
 	oidcGroup.GET("/userinfo", controller.Userinfo)

internal/controller/proxy_controller.go

@@ -13,6 +13,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/service"
 	"github.com/tinyauthapp/tinyauth/internal/utils"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/go-querystring/query"
@@ -53,29 +54,33 @@ type ProxyContext struct {
 
 type ProxyController struct {
 	log          *logger.Logger
-	runtime      model.RuntimeConfig
+	runtime      *model.RuntimeConfig
 	acls         *service.AccessControlsService
 	auth         *service.AuthService
 	policyEngine *service.PolicyEngine
 }
 
-func NewProxyController(
-	log *logger.Logger,
-	runtime model.RuntimeConfig,
-	router *gin.RouterGroup,
-	acls *service.AccessControlsService,
-	auth *service.AuthService,
-	policyEngine *service.PolicyEngine,
-) *ProxyController {
+type ProxyControllerInput struct {
+	dig.In
+
+	Log           *logger.Logger
+	RuntimeConfig *model.RuntimeConfig
+	RouterGroup   *gin.RouterGroup `name:"apiRouterGroup"`
+	ACLsService   *service.AccessControlsService
+	AuthService   *service.AuthService
+	PolicyEngine  *service.PolicyEngine
+}
+
+func NewProxyController(i ProxyControllerInput) *ProxyController {
 	controller := &ProxyController{
-		log:          log,
-		runtime:      runtime,
-		acls:         acls,
-		auth:         auth,
-		policyEngine: policyEngine,
+		log:          i.Log,
+		runtime:      i.RuntimeConfig,
+		acls:         i.ACLsService,
+		auth:         i.AuthService,
+		policyEngine: i.PolicyEngine,
 	}
 
-	proxyGroup := router.Group("/auth")
+	proxyGroup := i.RouterGroup.Group("/auth")
 	proxyGroup.Any("/:proxy", controller.proxyHandler)
 
 	return controller

internal/controller/resources_controller.go

@@ -5,25 +5,30 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/tinyauthapp/tinyauth/internal/model"
+	"go.uber.org/dig"
 )
 
 type ResourcesController struct {
-	config     model.Config
+	config     *model.Config
 	fileServer http.Handler
 }
 
-func NewResourcesController(
-	config model.Config,
-	router *gin.RouterGroup,
-) *ResourcesController {
-	fileServer := http.StripPrefix("/resources", http.FileServer(http.Dir(config.Resources.Path)))
+type ResourcesControllerInput struct {
+	dig.In
+
+	RouterGroup *gin.RouterGroup `name:"mainRouterGroup"`
+	Config      *model.Config
+}
+
+func NewResourcesController(i ResourcesControllerInput) *ResourcesController {
+	fileServer := http.StripPrefix("/resources", http.FileServer(http.Dir(i.Config.Resources.Path)))
 
 	controller := &ResourcesController{
-		config:     config,
+		config:     i.Config,
 		fileServer: fileServer,
 	}
 
-	router.GET("/resources/*resource", controller.resourcesHandler)
+	i.RouterGroup.GET("/resources/*resource", controller.resourcesHandler)
 
 	return controller
 }

internal/controller/user_controller.go

@@ -11,6 +11,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/service"
 	"github.com/tinyauthapp/tinyauth/internal/utils"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 	"github.com/pquerna/otp/totp"
@@ -27,23 +28,27 @@ type TotpRequest struct {
 
 type UserController struct {
 	log     *logger.Logger
-	runtime model.RuntimeConfig
+	runtime *model.RuntimeConfig
 	auth    *service.AuthService
 }
 
-func NewUserController(
-	log *logger.Logger,
-	runtimeConfig model.RuntimeConfig,
-	router *gin.RouterGroup,
-	auth *service.AuthService,
-) *UserController {
+type UserControllerInput struct {
+	dig.In
+
+	Log           *logger.Logger
+	RuntimeConfig *model.RuntimeConfig
+	RouterGroup   *gin.RouterGroup `name:"apiRouterGroup"`
+	AuthService   *service.AuthService
+}
+
+func NewUserController(i UserControllerInput) *UserController {
 	controller := &UserController{
-		log:     log,
-		runtime: runtimeConfig,
-		auth:    auth,
+		log:     i.Log,
+		runtime: i.RuntimeConfig,
+		auth:    i.AuthService,
 	}
 
-	userGroup := router.Group("/user")
+	userGroup := i.RouterGroup.Group("/user")
 	userGroup.POST("/login", controller.loginHandler)
 	userGroup.POST("/logout", controller.logoutHandler)
 	userGroup.POST("/totp", controller.totpHandler)

internal/controller/well_known_controller.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/tinyauthapp/tinyauth/internal/service"
+	"go.uber.org/dig"
 )
 
 type OpenIDConnectConfiguration struct {
@@ -30,13 +31,20 @@ type WellKnownController struct {
 	oidc *service.OIDCService
 }
 
-func NewWellKnownController(oidc *service.OIDCService, router *gin.RouterGroup) *WellKnownController {
+type WellKnownControllerInput struct {
+	dig.In
+
+	OIDCService *service.OIDCService
+	RouterGroup *gin.RouterGroup `name:"apiRouterGroup"`
+}
+
+func NewWellKnownController(i WellKnownControllerInput) *WellKnownController {
 	controller := &WellKnownController{
-		oidc: oidc,
+		oidc: i.OIDCService,
 	}
 
-	router.GET("/.well-known/openid-configuration", controller.OpenIDConnectConfiguration)
-	router.GET("/.well-known/jwks.json", controller.JWKS)
+	i.RouterGroup.GET("/.well-known/openid-configuration", controller.OpenIDConnectConfiguration)
+	i.RouterGroup.GET("/.well-known/jwks.json", controller.JWKS)
 
 	return controller
 }

internal/middleware/context_middleware.go

@@ -11,6 +11,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/service"
 	"github.com/tinyauthapp/tinyauth/internal/utils"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 )
@@ -37,25 +38,29 @@ var (
 
 type ContextMiddleware struct {
 	log       *logger.Logger
-	runtime   model.RuntimeConfig
+	runtime   *model.RuntimeConfig
 	auth      *service.AuthService
 	broker    *service.OAuthBrokerService
 	tailscale *service.TailscaleService
 }
 
-func NewContextMiddleware(
-	log *logger.Logger,
-	runtime model.RuntimeConfig,
-	auth *service.AuthService,
-	broker *service.OAuthBrokerService,
-	tailscale *service.TailscaleService,
-) *ContextMiddleware {
+type ContextMiddlewareInput struct {
+	dig.In
+
+	Log              *logger.Logger
+	RuntimeConfig    *model.RuntimeConfig
+	AuthService      *service.AuthService
+	BrokerService    *service.OAuthBrokerService
+	TailscaleService *service.TailscaleService
+}
+
+func NewContextMiddleware(i ContextMiddlewareInput) *ContextMiddleware {
 	return &ContextMiddleware{
-		log:       log,
-		runtime:   runtime,
-		auth:      auth,
-		broker:    broker,
-		tailscale: tailscale,
+		log:       i.Log,
+		runtime:   i.RuntimeConfig,
+		auth:      i.AuthService,
+		broker:    i.BrokerService,
+		tailscale: i.TailscaleService,
 	}
 }
 

internal/middleware/ui_middleware.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"github.com/tinyauthapp/tinyauth/internal/assets"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 )
@@ -18,7 +19,12 @@ type UIMiddleware struct {
 	uiFileServer http.Handler
 }
 
-func NewUIMiddleware() (*UIMiddleware, error) {
+// for future use if we need to inject dependencies into the middleware
+type UIMiddlewareInput struct {
+	dig.In
+}
+
+func NewUIMiddleware(_ UIMiddlewareInput) (*UIMiddleware, error) {
 	m := &UIMiddleware{}
 
 	ui, err := fs.Sub(assets.FrontendAssets, "dist")

internal/middleware/zerolog_middleware.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 )
 
 // See context middleware for explanation of why we have to do this
@@ -21,9 +22,15 @@ type ZerologMiddleware struct {
 	log *logger.Logger
 }
 
-func NewZerologMiddleware(log *logger.Logger) *ZerologMiddleware {
+type ZerologMiddlewareInput struct {
+	dig.In
+
+	Log *logger.Logger
+}
+
+func NewZerologMiddleware(i ZerologMiddlewareInput) *ZerologMiddleware {
 	return &ZerologMiddleware{
-		log: log,
+		log: i.Log,
 	}
 }
 

internal/service/access_controls_service.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/tinyauthapp/tinyauth/internal/model"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 )
 
 type LabelProvider interface {
@@ -13,19 +14,24 @@ type LabelProvider interface {
 
 type AccessControlsService struct {
 	log           *logger.Logger
-	config        model.Config
-	labelProvider *LabelProvider
+	config        *model.Config
+	labelProvider LabelProvider
 }
 
-func NewAccessControlsService(
-	log *logger.Logger,
-	config model.Config,
-	labelProvider *LabelProvider) *AccessControlsService {
+type AccessControlServiceInput struct {
+	dig.In
+
+	Log           *logger.Logger
+	Config        *model.Config
+	LabelProvider LabelProvider `optional:"true"`
+}
+
+func NewAccessControlsService(i AccessControlServiceInput) *AccessControlsService {
 
 	return &AccessControlsService{
-		log:           log,
-		config:        config,
-		labelProvider: labelProvider,
+		log:           i.Log,
+		config:        i.Config,
+		labelProvider: i.LabelProvider,
 	}
 }
 
@@ -57,8 +63,8 @@ func (service *AccessControlsService) GetAccessControls(domain string) (*model.A
 	}
 
 	// If we have a label provider configured, try to get ACLs from it
-	if service.labelProvider != nil && *service.labelProvider != nil {
-		return (*service.labelProvider).GetLabels(domain)
+	if service.labelProvider != nil {
+		return service.labelProvider.GetLabels(domain)
 	}
 
 	// no labels

internal/service/auth_service.go

@@ -14,6 +14,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/repository"
 	"github.com/tinyauthapp/tinyauth/internal/utils"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	"github.com/google/uuid"
 	"golang.org/x/crypto/bcrypt"
@@ -57,8 +58,8 @@ type LoginAttempt struct {
 
 type AuthService struct {
 	log     *logger.Logger
-	config  model.Config
-	runtime model.RuntimeConfig
+	config  *model.Config
+	runtime *model.RuntimeConfig
 	ctx     context.Context
 
 	ldap         *LdapService
@@ -82,28 +83,32 @@ type AuthService struct {
 	}
 }
 
-func NewAuthService(
-	log *logger.Logger,
-	config model.Config,
-	runtime model.RuntimeConfig,
-	ctx context.Context,
-	dg *ding.Ding,
-	ldap *LdapService,
-	queries repository.Store,
-	oauthBroker *OAuthBrokerService,
-	tailscale *TailscaleService,
-	policy *PolicyEngine,
-) *AuthService {
+type AuthServiceInput struct {
+	dig.In
+
+	Log          *logger.Logger
+	Config       *model.Config
+	Runtime      *model.RuntimeConfig
+	Ctx          context.Context
+	Ding         *ding.Ding
+	LDAP         *LdapService `optional:"true"`
+	Queries      repository.Store
+	OAuthBroker  *OAuthBrokerService
+	Tailscale    *TailscaleService `optional:"true"`
+	PolicyEngine *PolicyEngine
+}
+
+func NewAuthService(i AuthServiceInput) *AuthService {
 	service := &AuthService{
-		log:          log,
-		runtime:      runtime,
-		ctx:          ctx,
-		config:       config,
-		ldap:         ldap,
-		queries:      queries,
-		oauthBroker:  oauthBroker,
-		tailscale:    tailscale,
-		policyEngine: policy,
+		log:          i.Log,
+		runtime:      i.Runtime,
+		ctx:          i.Ctx,
+		config:       i.Config,
+		ldap:         i.LDAP,
+		queries:      i.Queries,
+		oauthBroker:  i.OAuthBroker,
+		tailscale:    i.Tailscale,
+		policyEngine: i.PolicyEngine,
 	}
 
 	// caches setup
@@ -115,7 +120,7 @@ func NewAuthService(
 	service.caches.login = loginCache
 	service.caches.ldap = ldapCache
 
-	dg.Go(func(ctx context.Context) {
+	i.Ding.Go(func(ctx context.Context) {
 		ticker := time.NewTicker(1 * time.Minute)
 		defer ticker.Stop()
 

internal/service/docker_service.go

@@ -8,6 +8,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/model"
 	"github.com/tinyauthapp/tinyauth/internal/utils/decoders"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	container "github.com/docker/docker/api/types/container"
 	"github.com/docker/docker/client"
@@ -21,36 +22,40 @@ type DockerService struct {
 	isConnected bool
 }
 
-func NewDockerService(
-	log *logger.Logger,
-	ctx context.Context,
-	dg *ding.Ding,
-) (*DockerService, error) {
+type DockerServiceInput struct {
+	dig.In
+
+	Log  *logger.Logger
+	Ctx  context.Context
+	Ding *ding.Ding
+}
+
+func NewDockerService(i DockerServiceInput) (*DockerService, error) {
 
 	client, err := client.NewClientWithOpts(client.FromEnv)
 	if err != nil {
 		return nil, err
 	}
 
-	client.NegotiateAPIVersion(ctx)
+	client.NegotiateAPIVersion(i.Ctx)
 
-	_, err = client.Ping(ctx)
+	_, err = client.Ping(i.Ctx)
 
 	if err != nil {
-		log.App.Debug().Err(err).Msg("Docker not connected")
+		i.Log.App.Debug().Err(err).Msg("Docker not connected")
 		return nil, nil
 	}
 
 	service := &DockerService{
-		log:     log,
+		log:     i.Log,
 		client:  client,
-		context: ctx,
+		context: i.Ctx,
 	}
 
 	service.isConnected = true
 	service.log.App.Debug().Msg("Docker connected successfully")
 
-	dg.Go(service.watchAndClose, ding.RingMajor)
+	i.Ding.Go(service.watchAndClose, ding.RingMajor)
 
 	return service, nil
 }

internal/service/kubernetes_service.go

@@ -12,6 +12,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/model"
 	"github.com/tinyauthapp/tinyauth/internal/utils/decoders"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
@@ -48,11 +49,15 @@ type KubernetesService struct {
 	appNameIndex map[string]ingressAppKey
 }
 
-func NewKubernetesService(
-	log *logger.Logger,
-	ctx context.Context,
-	dg *ding.Ding,
-) (*KubernetesService, error) {
+type KubernetesServiceInput struct {
+	dig.In
+
+	Log  *logger.Logger
+	Ctx  context.Context
+	Ding *ding.Ding
+}
+
+func NewKubernetesService(i KubernetesServiceInput) (*KubernetesService, error) {
 	cfg, err := rest.InClusterConfig()
 	if err != nil {
 		return nil, fmt.Errorf("failed to get in-cluster kubernetes config: %w", err)
@@ -69,31 +74,31 @@ func NewKubernetesService(
 		Resource: "ingresses",
 	}
 
-	accessCtx, accessCancel := context.WithTimeout(ctx, 5*time.Second)
+	accessCtx, accessCancel := context.WithTimeout(i.Ctx, 5*time.Second)
 	defer accessCancel()
 
 	_, err = client.Resource(gvr).List(accessCtx, metav1.ListOptions{Limit: 1})
 	if err != nil {
-		log.App.Warn().Err(err).Str("api", gvr.GroupVersion().String()).Msg("Failed to access Ingress API, Kubernetes label provider will be disabled")
+		i.Log.App.Warn().Err(err).Str("api", gvr.GroupVersion().String()).Msg("Failed to access Ingress API, Kubernetes label provider will be disabled")
 		return nil, fmt.Errorf("failed to access ingress api: %w", err)
 	}
 
-	log.App.Debug().Str("api", gvr.GroupVersion().String()).Msg("Successfully accessed Ingress API, starting watcher")
+	i.Log.App.Debug().Str("api", gvr.GroupVersion().String()).Msg("Successfully accessed Ingress API, starting watcher")
 
 	service := &KubernetesService{
-		log:          log,
+		log:          i.Log,
 		client:       client,
 		ingressApps:  make(map[ingressKey][]ingressApp),
 		domainIndex:  make(map[string]ingressAppKey),
 		appNameIndex: make(map[string]ingressAppKey),
 	}
 
-	dg.Go(func(ctx context.Context) {
+	i.Ding.Go(func(ctx context.Context) {
 		service.watchGVR(gvr, ctx)
 	}, ding.RingMajor)
 
 	service.started = true
-	log.App.Debug().Msg("Kubernetes label provider started successfully")
+	i.Log.App.Debug().Msg("Kubernetes label provider started successfully")
 
 	return service, nil
 }

internal/service/ldap_service.go

@@ -13,44 +13,48 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/model"
 	"github.com/tinyauthapp/tinyauth/internal/utils"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 )
 
 type LdapService struct {
 	log    *logger.Logger
-	config model.Config
+	config *model.Config
 
-	conn  *ldapgo.Conn
-	mutex sync.RWMutex
-	cert  *tls.Certificate
+	conn   *ldapgo.Conn
+	mutex  sync.RWMutex
+	cert   *tls.Certificate
+	bindPw string
 }
 
-func NewLdapService(
-	log *logger.Logger,
-	config model.Config,
-	dg *ding.Ding,
-) (*LdapService, error) {
-	if config.LDAP.Address == "" {
+type LdapServiceInput struct {
+	dig.In
+
+	Log    *logger.Logger
+	Config *model.Config
+	Ding   *ding.Ding
+}
+
+func NewLdapService(i LdapServiceInput) (*LdapService, error) {
+	if i.Config.LDAP.Address == "" {
 		return nil, nil
 	}
 
-	secret := utils.GetSecret(config.LDAP.BindPassword, config.LDAP.BindPasswordFile)
-	config.LDAP.BindPassword = secret
-	config.LDAP.BindPasswordFile = ""
-
 	ldap := &LdapService{
-		log:    log,
-		config: config,
+		log:    i.Log,
+		config: i.Config,
 	}
 
+	ldap.bindPw = utils.GetSecret(i.Config.LDAP.BindPassword, i.Config.LDAP.BindPasswordFile)
+
 	// Check whether authentication with client certificate is possible
-	if config.LDAP.AuthCert != "" && config.LDAP.AuthKey != "" {
-		cert, err := tls.LoadX509KeyPair(config.LDAP.AuthCert, config.LDAP.AuthKey)
+	if i.Config.LDAP.AuthCert != "" && i.Config.LDAP.AuthKey != "" {
+		cert, err := tls.LoadX509KeyPair(i.Config.LDAP.AuthCert, i.Config.LDAP.AuthKey)
 
 		if err != nil {
 			return nil, fmt.Errorf("failed to initialize LDAP with mTLS authentication: %w", err)
 		}
 
-		log.App.Info().Msg("LDAP mTLS authentication configured successfully")
+		i.Log.App.Info().Msg("LDAP mTLS authentication configured successfully")
 
 		ldap.cert = &cert
 
@@ -72,7 +76,7 @@ func NewLdapService(
 		return nil, fmt.Errorf("failed to connect to ldap server: %w", err)
 	}
 
-	dg.Go(func(ctx context.Context) {
+	i.Ding.Go(func(ctx context.Context) {
 		ldap.log.App.Debug().Msg("Starting LDAP connection heartbeat routine")
 
 		ticker := time.NewTicker(5 * time.Minute)
@@ -217,7 +221,7 @@ func (ldap *LdapService) BindService(rebind bool) error {
 	if ldap.cert != nil {
 		return ldap.conn.ExternalBind()
 	}
-	return ldap.conn.Bind(ldap.config.LDAP.BindDN, ldap.config.LDAP.BindPassword)
+	return ldap.conn.Bind(ldap.config.LDAP.BindDN, ldap.bindPw)
 }
 
 func (ldap *LdapService) Bind(userDN string, password string) error {

internal/service/oauth_broker_service.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/tinyauthapp/tinyauth/internal/model"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	"slices"
 
@@ -32,23 +33,27 @@ var presets = map[string]func(config model.OAuthServiceConfig, ctx context.Conte
 	"google": newGoogleOAuthService,
 }
 
-func NewOAuthBrokerService(
-	log *logger.Logger,
-	configs map[string]model.OAuthServiceConfig,
-	ctx context.Context,
-) *OAuthBrokerService {
+type OAuthBrokerServiceInput struct {
+	dig.In
+
+	Log     *logger.Logger
+	Runtime *model.RuntimeConfig
+	Ctx     context.Context
+}
+
+func NewOAuthBrokerService(i OAuthBrokerServiceInput) *OAuthBrokerService {
 	service := &OAuthBrokerService{
-		log:      log,
+		log:      i.Log,
 		services: make(map[string]OAuthServiceImpl),
-		configs:  configs,
+		configs:  i.Runtime.OAuthProviders,
 	}
 
-	for name, cfg := range configs {
+	for name, cfg := range service.configs {
 		if presetFunc, exists := presets[name]; exists {
-			service.services[name] = presetFunc(cfg, ctx)
+			service.services[name] = presetFunc(cfg, i.Ctx)
 			service.log.App.Debug().Str("service", name).Msg("Loaded OAuth service from preset")
 		} else {
-			service.services[name] = NewOAuthService(cfg, name, ctx)
+			service.services[name] = NewOAuthService(cfg, name, i.Ctx)
 			service.log.App.Debug().Str("service", name).Msg("Loaded OAuth service from custom config")
 		}
 	}

internal/service/oidc_service.go

@@ -14,6 +14,7 @@ import (
 	"fmt"
 	"net/url"
 	"os"
+	"path/filepath"
 	"strings"
 	"time"
 
@@ -26,6 +27,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/repository"
 	"github.com/tinyauthapp/tinyauth/internal/utils"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 )
 
 var (
@@ -133,8 +135,8 @@ type UsedCodeEntry struct {
 
 type OIDCService struct {
 	log     *logger.Logger
-	config  model.Config
-	runtime model.RuntimeConfig
+	config  *model.Config
+	runtime *model.RuntimeConfig
 	queries repository.Store
 
 	clients    map[string]model.OIDCClientConfig
@@ -149,19 +151,24 @@ type OIDCService struct {
 	}
 }
 
-func NewOIDCService(
-	log *logger.Logger,
-	config model.Config,
-	runtime model.RuntimeConfig,
-	queries repository.Store,
-	dg *ding.Ding) (*OIDCService, error) {
+type OIDCServiceInput struct {
+	dig.In
+
+	Log     *logger.Logger
+	Config  *model.Config
+	Runtime *model.RuntimeConfig
+	Queries repository.Store
+	Ding    *ding.Ding
+}
+
+func NewOIDCService(i OIDCServiceInput) (*OIDCService, error) {
 	// If not configured, skip init
-	if len(runtime.OIDCClients) == 0 {
+	if len(i.Runtime.OIDCClients) == 0 {
 		return nil, nil
 	}
 
 	// Ensure issuer is https
-	uissuer, err := url.Parse(runtime.AppURL)
+	uissuer, err := url.Parse(i.Runtime.AppURL)
 
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse app url: %w", err)
@@ -174,14 +181,14 @@ func NewOIDCService(
 	issuer := fmt.Sprintf("%s://%s", uissuer.Scheme, uissuer.Host)
 
 	// Create/load private and public keys
-	if strings.TrimSpace(config.OIDC.PrivateKeyPath) == "" ||
-		strings.TrimSpace(config.OIDC.PublicKeyPath) == "" {
+	if strings.TrimSpace(i.Config.OIDC.PrivateKeyPath) == "" ||
+		strings.TrimSpace(i.Config.OIDC.PublicKeyPath) == "" {
 		return nil, errors.New("private key path and public key path are required")
 	}
 
 	var privateKey *rsa.PrivateKey
 
-	fprivateKey, err := os.ReadFile(config.OIDC.PrivateKeyPath)
+	fprivateKey, err := os.ReadFile(i.Config.OIDC.PrivateKeyPath)
 
 	if err != nil && !errors.Is(err, os.ErrNotExist) {
 		return nil, err
@@ -200,8 +207,12 @@ func NewOIDCService(
 			Type:  "RSA PRIVATE KEY",
 			Bytes: der,
 		})
-		log.App.Trace().Str("type", "RSA PRIVATE KEY").Msg("Generated private RSA key")
-		err = os.WriteFile(config.OIDC.PrivateKeyPath, encoded, 0600)
+		i.Log.App.Trace().Str("type", "RSA PRIVATE KEY").Msg("Generated private RSA key")
+		err := os.MkdirAll(filepath.Dir(i.Config.OIDC.PrivateKeyPath), 0700)
+		if err != nil {
+			return nil, fmt.Errorf("failed to create directory for private key: %w", err)
+		}
+		err = os.WriteFile(i.Config.OIDC.PrivateKeyPath, encoded, 0600)
 		if err != nil {
 			return nil, fmt.Errorf("failed to write private key to file: %w", err)
 		}
@@ -210,7 +221,7 @@ func NewOIDCService(
 		if block == nil {
 			return nil, errors.New("failed to decode private key")
 		}
-		log.App.Trace().Str("type", block.Type).Msg("Loaded private key")
+		i.Log.App.Trace().Str("type", block.Type).Msg("Loaded private key")
 		privateKey, err = x509.ParsePKCS1PrivateKey(block.Bytes)
 		if err != nil {
 			return nil, fmt.Errorf("failed to parse private key: %w", err)
@@ -219,7 +230,7 @@ func NewOIDCService(
 
 	var publicKey crypto.PublicKey
 
-	fpublicKey, err := os.ReadFile(config.OIDC.PublicKeyPath)
+	fpublicKey, err := os.ReadFile(i.Config.OIDC.PublicKeyPath)
 
 	if err != nil && !errors.Is(err, os.ErrNotExist) {
 		return nil, fmt.Errorf("failed to read public key: %w", err)
@@ -235,8 +246,12 @@ func NewOIDCService(
 			Type:  "RSA PUBLIC KEY",
 			Bytes: der,
 		})
-		log.App.Trace().Str("type", "RSA PUBLIC KEY").Msg("Generated public RSA key")
-		err = os.WriteFile(config.OIDC.PublicKeyPath, encoded, 0644)
+		i.Log.App.Trace().Str("type", "RSA PUBLIC KEY").Msg("Generated public RSA key")
+		err := os.MkdirAll(filepath.Dir(i.Config.OIDC.PublicKeyPath), 0700)
+		if err != nil {
+			return nil, fmt.Errorf("failed to create directory for public key: %w", err)
+		}
+		err = os.WriteFile(i.Config.OIDC.PublicKeyPath, encoded, 0644)
 		if err != nil {
 			return nil, err
 		}
@@ -245,7 +260,7 @@ func NewOIDCService(
 		if block == nil {
 			return nil, errors.New("failed to decode public key")
 		}
-		log.App.Trace().Str("type", block.Type).Msg("Loaded public key")
+		i.Log.App.Trace().Str("type", block.Type).Msg("Loaded public key")
 		switch block.Type {
 		case "RSA PUBLIC KEY":
 			publicKey, err = x509.ParsePKCS1PublicKey(block.Bytes)
@@ -275,7 +290,7 @@ func NewOIDCService(
 	// We will reorganize the client into a map with the client ID as the key
 	clients := make(map[string]model.OIDCClientConfig)
 
-	for id, client := range config.OIDC.Clients {
+	for id, client := range i.Config.OIDC.Clients {
 		client.ID = id
 		if client.Name == "" {
 			client.Name = utils.Capitalize(client.ID)
@@ -291,15 +306,15 @@ func NewOIDCService(
 		}
 		client.ClientSecretFile = ""
 		clients[id] = client
-		log.App.Debug().Str("clientId", client.ClientID).Msg("Loaded OIDC client configuration")
+		i.Log.App.Debug().Str("clientId", client.ClientID).Msg("Loaded OIDC client configuration")
 	}
 
 	// Initialize the service
 	service := &OIDCService{
-		log:     log,
-		config:  config,
-		runtime: runtime,
-		queries: queries,
+		log:     i.Log,
+		config:  i.Config,
+		runtime: i.Runtime,
+		queries: i.Queries,
 
 		clients:    clients,
 		privateKey: privateKey,
@@ -308,7 +323,7 @@ func NewOIDCService(
 	}
 
 	// Start cleanup routine
-	dg.Go(service.cleanupRoutine, ding.RingMinor)
+	i.Ding.Go(service.cleanupRoutine, ding.RingMinor)
 
 	// Create caches
 	codeCash := NewCacheStore[AuthorizeCodeEntry](256)
@@ -320,7 +335,7 @@ func NewOIDCService(
 	service.caches.authorize = authorize
 
 	// Start cache cleanup routine
-	dg.Go(func(ctx context.Context) {
+	i.Ding.Go(func(ctx context.Context) {
 		ticker := time.NewTicker(1 * time.Minute)
 		defer ticker.Stop()
 

internal/service/policy_engine.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/tinyauthapp/tinyauth/internal/model"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 )
 
 type Policy string
@@ -40,21 +41,28 @@ type PolicyEngine struct {
 	policy Policy
 }
 
-func NewPolicyEngine(config model.Config, log *logger.Logger) (*PolicyEngine, error) {
+type PolicyEngineInput struct {
+	dig.In
+
+	Log    *logger.Logger
+	Config *model.Config
+}
+
+func NewPolicyEngine(i PolicyEngineInput) (*PolicyEngine, error) {
 	engine := PolicyEngine{
-		log:   log,
+		log:   i.Log,
 		rules: make(map[RuleName]Rule),
 	}
 
-	switch config.Auth.ACLs.Policy {
+	switch i.Config.Auth.ACLs.Policy {
 	case string(PolicyAllow):
-		log.App.Debug().Msg("Using 'allow' ACL policy: access to apps will be allowed by default unless explicitly blocked")
+		i.Log.App.Debug().Msg("Using 'allow' ACL policy: access to apps will be allowed by default unless explicitly blocked")
 		engine.policy = PolicyAllow
 	case string(PolicyDeny):
-		log.App.Debug().Msg("Using 'deny' ACL policy: access to apps will be blocked by default unless explicitly allowed")
+		i.Log.App.Debug().Msg("Using 'deny' ACL policy: access to apps will be blocked by default unless explicitly allowed")
 		engine.policy = PolicyDeny
 	default:
-		return nil, fmt.Errorf("invalid acl policy: %s", config.Auth.ACLs.Policy)
+		return nil, fmt.Errorf("invalid acl policy: %s", i.Config.Auth.ACLs.Policy)
 	}
 
 	return &engine, nil

internal/service/tailscale_service.go

@@ -12,6 +12,7 @@ import (
 	"github.com/steveiliop56/ding"
 	"github.com/tinyauthapp/tinyauth/internal/model"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 	"tailscale.com/client/local"
 	"tailscale.com/tsnet"
 )
@@ -25,7 +26,7 @@ type TailscaleWhoisResponse struct {
 
 type TailscaleService struct {
 	log    *logger.Logger
-	config model.Config
+	config *model.Config
 	ctx    context.Context
 
 	srv *tsnet.Server
@@ -34,22 +35,31 @@ type TailscaleService struct {
 	mu  sync.Mutex
 }
 
-func NewTailscaleService(log *logger.Logger, config model.Config, ctx context.Context, dg *ding.Ding) (*TailscaleService, error) {
-	if !config.Tailscale.Enabled {
+type TailscaleServiceInput struct {
+	dig.In
+
+	Log    *logger.Logger
+	Config *model.Config
+	Ctx    context.Context
+	Ding   *ding.Ding
+}
+
+func NewTailscaleService(i TailscaleServiceInput) (*TailscaleService, error) {
+	if !i.Config.Tailscale.Enabled {
 		return nil, nil
 	}
 
 	srv := new(tsnet.Server)
 
 	// node options
-	srv.Dir = config.Tailscale.Dir
-	srv.Hostname = config.Tailscale.Hostname
-	srv.AuthKey = config.Tailscale.AuthKey
-	srv.Ephemeral = config.Tailscale.Ephemeral
+	srv.Dir = i.Config.Tailscale.Dir
+	srv.Hostname = i.Config.Tailscale.Hostname
+	srv.AuthKey = i.Config.Tailscale.AuthKey
+	srv.Ephemeral = i.Config.Tailscale.Ephemeral
 
 	// redirect logs to zerolog
-	srv.Logf = log.App.Printf
-	srv.UserLogf = log.App.Printf
+	srv.Logf = i.Log.App.Printf
+	srv.UserLogf = i.Log.App.Printf
 
 	err := srv.Start()
 
@@ -65,14 +75,14 @@ func NewTailscaleService(log *logger.Logger, config model.Config, ctx context.Co
 	}
 
 	service := &TailscaleService{
-		log:    log,
-		config: config,
-		ctx:    ctx,
+		log:    i.Log,
+		config: i.Config,
+		ctx:    i.Ctx,
 		srv:    srv,
 		lc:     lc,
 	}
 
-	connectCtx, cancel := context.WithTimeout(ctx, 2*time.Minute) // large enough timeout to allow for user to manually authenticate with link if needed
+	connectCtx, cancel := context.WithTimeout(i.Ctx, 2*time.Minute) // large enough timeout to allow for user to manually authenticate with link if needed
 	defer cancel()
 
 	err = service.waitForConn(connectCtx)
@@ -82,7 +92,7 @@ func NewTailscaleService(log *logger.Logger, config model.Config, ctx context.Co
 		return nil, fmt.Errorf("failed to connect to tailscale network: %w", err)
 	}
 
-	dg.Go(service.watchAndClose, ding.RingMajor)
+	i.Ding.Go(service.watchAndClose, ding.RingMajor)
 
 	return service, nil
 }