feat: unified config (#533)

* chore: add yaml config ref

* feat: add initial implementation of a traefik like cli

* refactor: remove dependency on traefik

* chore: update example env

* refactor: update build

* chore: remove unused code

* fix: fix translations not loading

* feat: add experimental config file support

* chore: mod tidy

* fix: review comments

* refactor: move tinyauth to separate package

* chore: add quotes to all env variables

* chore: resolve go mod and sum conflicts

* chore: go mod tidy

* fix: review comments

cmd/tinyauth/healthcheck.go

@@ -0,0 +1,85 @@
+package main
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+	"github.com/traefik/paerser/cli"
+)
+
+type healthzResponse struct {
+	Status  string `json:"status"`
+	Message string `json:"message"`
+}
+
+func healthcheckCmd() *cli.Command {
+	return &cli.Command{
+		Name:          "healthcheck",
+		Description:   "Perform a health check",
+		Configuration: nil,
+		Resources:     nil,
+		AllowArg:      true,
+		Run: func(args []string) error {
+			log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stderr, TimeFormat: time.RFC3339}).With().Caller().Logger().Level(zerolog.InfoLevel)
+
+			appUrl := os.Getenv("TINYAUTH_APPURL")
+
+			if len(args) > 0 {
+				appUrl = args[0]
+			}
+
+			if appUrl == "" {
+				return errors.New("TINYAUTH_APPURL is not set and no argument was provided")
+			}
+
+			log.Info().Str("app_url", appUrl).Msg("Performing health check")
+
+			client := http.Client{
+				Timeout: 30 * time.Second,
+			}
+
+			req, err := http.NewRequest("GET", appUrl+"/api/healthz", nil)
+
+			if err != nil {
+				return fmt.Errorf("failed to create request: %w", err)
+			}
+
+			resp, err := client.Do(req)
+
+			if err != nil {
+				return fmt.Errorf("failed to perform request: %w", err)
+			}
+
+			if resp.StatusCode != http.StatusOK {
+				return fmt.Errorf("service is not healthy, got: %s", resp.Status)
+			}
+
+			defer resp.Body.Close()
+
+			var healthResp healthzResponse
+
+			body, err := io.ReadAll(resp.Body)
+
+			if err != nil {
+				return fmt.Errorf("failed to read response: %w", err)
+			}
+
+			err = json.Unmarshal(body, &healthResp)
+
+			if err != nil {
+				return fmt.Errorf("failed to decode response: %w", err)
+			}
+
+			log.Info().Interface("response", healthResp).Msg("Tinyauth is healthy")
+
+			return nil
+		},
+	}
+}