# --- 第一阶段：构建阶段 ---
    FROM node:18-bullseye-slim AS builder

    # 设置构建环境变量
    ENV NODE_ENV=development
    
    # 设置工作目录
    WORKDIR /app
    
    # 安装 pnpm
    RUN npm install -g pnpm
    
    # 复制依赖声明文件
    COPY package.json pnpm-lock.yaml ./
    
    # 安装所有依赖（包括开发依赖）
    RUN pnpm install
    
    # 复制项目源码（注意 .dockerignore 应该屏蔽 node_modules 等无关内容）
    COPY . .
    
    # 编译 Next.js 应用
    RUN pnpm run build
    
    # --- 第二阶段：生产环境运行阶段 ---
    FROM node:18-slim AS runner
    
    # 设置运行环境变量
    ENV NODE_ENV=production
    ENV PORT=3008
    
    # 安装 pm2
    RUN npm install -g pm2
    
    # 设置运行目录
    WORKDIR /app
    
    # 复制生产所需文件
    COPY --from=builder /app/package.json ./
    COPY --from=builder /app/pnpm-lock.yaml ./
    COPY --from=builder /app/node_modules ./node_modules
    COPY --from=builder /app/.next ./.next
    COPY --from=builder /app/public ./public
    COPY --from=builder /app/next.config.js ./next.config.js
    COPY --from=builder /app/vercel.json ./vercel.json # 如果有
    COPY --from=builder /app/locales ./locales        # 如果有多语言
    
    # 清理无用缓存，减小镜像体积
    RUN rm -rf /root/.npm /root/.pnpm-store /tmp/*
    
    # 暴露端口
    EXPOSE 3008
    
    # 容器启动命令
    CMD ["pm2-runtime", "npm", "--", "start"]