Docker 部署实战

一、核心概念

• 镜像：只读模板
• 容器：镜像的运行实例
• 仓库：镜像存储与分发

二、编写 Dockerfile

FROM node:18-alpine
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 3000
CMD ["npm", "start"]

三、docker-compose 编排

version: '3'
services:
  app:
    build: .
    ports:
      - "3000:3000"
    depends_on:
      - mysql
  mysql:
    image: mysql:8
    environment:
      MYSQL_ROOT_PASSWORD: 123456