chore(deps): migrate fiber from v2 to v3

The automated update changed only go.mod, so the build failed on the old v2 imports. This commit moves the code to the v3 API.

The commit replaces BodyParser with Bind().Body, Static with the static middleware, and ListenTLS with ListenConfig. It also updates the tests for TestConfig.

Fixes #179

pkg/app/app.go

@@ -15,8 +15,9 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/gofiber/fiber/v2"
-	"github.com/gofiber/fiber/v2/middleware/adaptor"
+	"github.com/gofiber/fiber/v3"
+	"github.com/gofiber/fiber/v3/middleware/adaptor"
+	"github.com/gofiber/fiber/v3/middleware/static"
 	"github.com/lukaszraczylo/gohoarder/pkg/analytics"
 	"github.com/lukaszraczylo/gohoarder/pkg/auth"
 	"github.com/lukaszraczylo/gohoarder/pkg/cache"
@@ -554,10 +555,10 @@ func (a *App) setupServer() error {
 	frontendDir := "frontend/dist"
 	if _, err := os.Stat(frontendDir); err == nil {
 		log.Info().Str("dir", frontendDir).Msg("Serving frontend static files")
-		a.app.Static("/", frontendDir)
+		a.app.Use("/", static.New(frontendDir))
 	} else {
 		log.Warn().Msg("Frontend dist directory not found, frontend won't be served")
-		a.app.Get("/", func(c *fiber.Ctx) error {
+		a.app.Get("/", func(c fiber.Ctx) error {
 			return c.Type("html").SendString(`
 				<html>
 				<head><title>GoHoarder</title></head>
@@ -607,7 +608,7 @@ func (a *App) Run() error {
 				Str("addr", addr).
 				Str("cert_file", a.config.Server.TLS.CertFile).
 				Msg("Starting Fiber server with TLS")
-			if err := a.app.ListenTLS(addr, a.config.Server.TLS.CertFile, a.config.Server.TLS.KeyFile); err != nil {
+			if err := a.app.Listen(addr, fiber.ListenConfig{CertFile: a.config.Server.TLS.CertFile, CertKeyFile: a.config.Server.TLS.KeyFile}); err != nil {
 				errChan <- err
 			}
 			return
@@ -643,6 +644,7 @@ func (a *App) Run() error {
 	// Graceful shutdown
 	return a.Shutdown()
 }
+
 // Shutdown gracefully shuts down the application
 func (a *App) Shutdown() error {
 	log.Info().Msg("Starting graceful shutdown")