Initial fullstack project setup with Next.js 15, Gin, PostgreSQL and Docker Compose

- Frontend: Next.js 15 (App Router), Auth.js v5, shadcn/ui, MagicUI
- Backend: Go + Gin + GORM with layered architecture
- Auth: Local credentials login with optional Keycloak OAuth binding
- Admin: RBAC user management for admin role
- Dev: Docker Compose with hot reload for both frontend and backend
- Docker: 3-service orchestration (frontend, backend, postgres)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/internal/router/router.go

@@ -0,0 +1,51 @@
+package router
+
+import (
+	"evanpage-backend/internal/config"
+	"evanpage-backend/internal/db"
+	"evanpage-backend/internal/handler"
+	"evanpage-backend/internal/middleware"
+	"evanpage-backend/internal/repository"
+	"evanpage-backend/internal/service"
+
+	"github.com/gin-gonic/gin"
+)
+
+func Setup(cfg *config.Config) *gin.Engine {
+	r := gin.New()
+	r.Use(middleware.Logger())
+	r.Use(middleware.CORS())
+	r.Use(gin.Recovery())
+
+	userRepo := repository.NewUserRepository(db.DB)
+	userService := service.NewUserService(userRepo)
+
+	authHandler := handler.NewAuthHandler(userService)
+	healthHandler := handler.NewHealthHandler(db.DB)
+	adminHandler := handler.NewAdminHandler(userService)
+
+	// Public routes
+	r.POST("/api/auth/register", authHandler.Register)
+	r.POST("/api/auth/local-login", authHandler.LocalLogin)
+	r.POST("/api/auth/lookup-binding", authHandler.LookupBinding)
+	r.POST("/api/auth/bind-keycloak", authHandler.BindKeycloak)
+	r.POST("/api/auth/init", authHandler.InitAdmin)
+	r.GET("/api/health", healthHandler.Check)
+
+	// Protected routes
+	api := r.Group("/api")
+	api.Use(middleware.AuthProxy())
+	{
+	}
+
+	// Admin routes
+	admin := api.Group("/admin")
+	admin.Use(middleware.RequireRole("admin"))
+	{
+		admin.GET("/users", adminHandler.ListUsers)
+		admin.POST("/users", adminHandler.CreateUser)
+		admin.DELETE("/users/:id", adminHandler.DeleteUser)
+	}
+
+	return r
+}