chore: Docker 双服务 + Makefile/build.ps1 双进程目标 + README 架构更新

- Dockerfile 改为 Node 24 运行时：Vike 产物 + Go API 二进制共用镜像
- docker-compose 双容器：web(:3000 对外 SSR) + api(:3001 内部，持 /data 卷)
- entrypoint 改用 gosu 降权（Debian 基础镜像），健康检查用 node fetch
- Makefile/build.ps1：build 不再打包前端，新增 serve（本地双进程）与 web-build
- README 同步双服务架构、端口/环境变量、部署与开发说明

docker-compose.yml

@@ -1,17 +1,17 @@
-# 姜十三论坛 — Docker Compose 单服务部署
+# 姜十三论坛 — Docker Compose 双服务部署
+# 架构：web（Node :3000 对外：Vike SSR + 静态资源 + API 反代） → api（Go :3001 内部：纯 API + /data 数据卷）
 # 启动：docker compose up -d --build
 # 或：make compose-up / build.bat -Target compose-up
 
 services:
-  jiang13:
+  api:
     image: hangzhang714128/jiang13-forum:latest
     build:
       context: .
       dockerfile: Dockerfile
       args:
         VERSION: dev
-    ports:
-      - "3000:3000"
+    command: ["--work-path", "/app", "--data", "/data", "--port", "3001"]
     volumes:
       - jiang13-data:/data
       # 可选：挂载自定义 app.ini（只读）
@@ -20,10 +20,34 @@ services:
       TZ: Asia/Shanghai
       # 可选：固定 JWT 密钥（留空则自动生成并持久化到 /data/.jwt_secret）
       # JIANG13_JWT_SECRET: your-secret-here
+    expose:
+      - "3001"
     restart: unless-stopped
     stop_grace_period: 15s
     healthcheck:
-      test: ["CMD", "wget", "-qO-", "http://127.0.0.1:3000/health"]
+      test: ["CMD", "node", "-e", "fetch('http://127.0.0.1:3001/health').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 15s
+
+  web:
+    image: hangzhang714128/jiang13-forum:latest
+    entrypoint: ["node", "server/index.mjs"]
+    working_dir: /app/frontend
+    user: "1000:1000"
+    ports:
+      - "3000:3000"
+    environment:
+      TZ: Asia/Shanghai
+      PORT: "3000"
+      GO_API_URL: http://api:3001
+    depends_on:
+      api:
+        condition: service_healthy
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "node", "-e", "fetch('http://127.0.0.1:3000/healthz').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"]
       interval: 30s
       timeout: 5s
       retries: 3