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>

docker-compose.yml

@@ -0,0 +1,71 @@
+services:
+  db:
+    image: postgres:16-alpine
+    container_name: evanpage-db
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER:-evan}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-evanpass}
+      POSTGRES_DB: ${POSTGRES_DB:-evanpage}
+    ports:
+      - "5432:5432"
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-evan} -d ${POSTGRES_DB:-evanpage}"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    networks:
+      - evanpage-net
+
+  backend:
+    build:
+      context: ./backend
+      target: dev
+    container_name: evanpage-backend
+    environment:
+      DATABASE_URL: ${DATABASE_URL:-postgres://evan:evanpass@db:5432/evanpage?sslmode=disable}
+      SERVER_PORT: ${SERVER_PORT:-8080}
+      SERVER_API_URL: ${SERVER_API_URL:-http://backend:8080}
+      AUTH_SECRET: ${AUTH_SECRET:-}
+      AUTH_KEYCLOAK_ISSUER: ${AUTH_KEYCLOAK_ISSUER:-}
+      AUTH_KEYCLOAK_ID: ${AUTH_KEYCLOAK_ID:-}
+      AUTH_KEYCLOAK_SECRET: ${AUTH_KEYCLOAK_SECRET:-}
+    ports:
+      - "8080:8080"
+    volumes:
+      - ./backend:/app
+      - /app/tmp
+    depends_on:
+      db:
+        condition: service_healthy
+    networks:
+      - evanpage-net
+
+  frontend:
+    build:
+      context: ./frontend
+    container_name: evanpage-frontend
+    environment:
+      SERVER_API_URL: ${SERVER_API_URL:-http://backend:8080}
+      NEXT_PUBLIC_API_URL: ${NEXT_PUBLIC_API_URL:-http://localhost:8080}
+      AUTH_SECRET: ${AUTH_SECRET:-}
+      AUTH_KEYCLOAK_ISSUER: ${AUTH_KEYCLOAK_ISSUER:-}
+      AUTH_KEYCLOAK_ID: ${AUTH_KEYCLOAK_ID:-}
+      AUTH_KEYCLOAK_SECRET: ${AUTH_KEYCLOAK_SECRET:-}
+    ports:
+      - "3000:3000"
+    volumes:
+      - ./frontend:/app
+      - /app/node_modules
+    depends_on:
+      - backend
+    networks:
+      - evanpage-net
+
+volumes:
+  pgdata:
+
+networks:
+  evanpage-net:
+    driver: bridge