ci: 添加 Docker + Jenkins 自动化部署配置

- Dockerfile 多阶段构建，standalone 模式输出
- Jenkinsfile 定义 GitLab 触发的 CI/CD 流水线
- docker-compose.yml 简化部署
- next.config.ts 开启 standalone 输出

docker-compose.yml

@@ -0,0 +1,15 @@
+services:
+  app:
+    build: .
+    image: no-whatever:latest
+    container_name: no-whatever
+    ports:
+      - "3000:3000"
+    volumes:
+      - app-data:/app/data
+    environment:
+      - DATABASE_URL=file:/app/data/dev.db
+    restart: unless-stopped
+
+volumes:
+  app-data: