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# 使用官方 Node 镜像
FROM node:18
# 设置容器内工作目录
WORKDIR /app
# 拷贝依赖清单
COPY package*.json ./
# 安装依赖
RUN npm install
# 拷贝项目文件
COPY . .
# 启动服务（默认端口为 3000）
EXPOSE 3000
CMD ["node", "server.js"]