refactor: move resource handling to a controller

internal/controller/health_controller.go

@@ -14,6 +14,7 @@ func NewHealthController(router *gin.RouterGroup) *HealthController {
 
 func (controller *HealthController) SetupRoutes() {
 	controller.Router.GET("/health", controller.healthHandler)
+	controller.Router.HEAD("/health", controller.healthHandler)
 }
 
 func (controller *HealthController) healthHandler(c *gin.Context) {

internal/controller/resources_controller.go

@@ -0,0 +1,32 @@
+package controller
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+type ResourcesControllerConfig struct {
+	ResourcesDir string
+}
+
+type ResourcesController struct {
+	Config ResourcesControllerConfig
+	Router *gin.RouterGroup
+}
+
+func NewResourcesController(config ResourcesControllerConfig, router *gin.RouterGroup) *ResourcesController {
+	return &ResourcesController{
+		Config: config,
+		Router: router,
+	}
+}
+
+func (controller *ResourcesController) SetupRoutes() {
+	controller.Router.GET("/resources/*resource", controller.resourcesHandler)
+}
+
+func (controller *ResourcesController) resourcesHandler(c *gin.Context) {
+	fileServer := http.StripPrefix("/resources", http.FileServer(http.Dir(controller.Config.ResourcesDir)))
+	fileServer.ServeHTTP(c.Writer, c.Request)
+}