解决了by attaching a volume问题。更新&工作docker-compose.yml在这里：

version: '3'

services:
  with-docker-multi-env-staging:
    build:
      context: ../../
      dockerfile: docker/staging/Dockerfile
    image: with-docker-multi-env-staging
    ports:
      - '3002:3000'
    depends_on:
      - db
  db:
    image: mariadb
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: dashboard
      MYSQL_DATABASE: dashboard
      MYSQL_USER: dashboard
      MYSQL_PASSWORD: dashboard
    ports:
      - "3306:3306"
    volumes:
      - db-data:/var/lib/mysql
volumes:
  db-data:

字符串

编辑：改进版基于以下danblack的评论。

• 改进：*
• 使用MARIADB_代替MYSQL_
• 添加了运行状况检查
• 为数据库迁移添加了一个额外的层（绝对疯狂哟）

version: '3'

services:
  next-staging:
    build:
      context: ../../
      dockerfile: docker/staging/Dockerfile
    image: next-staging
    ports:
      - '3002:3000'
    depends_on:
      db:
        condition: service_healthy
      migrate-db:
        condition: service_completed_successfully
  migrate-db:
    build:
      context: ../../
      dockerfile: docker/staging/migrate.Dockerfile
    image: migrate-db
    depends_on:
      db:
        condition: service_healthy
  db:
    image: mariadb:latest
    restart: always
    environment:
      MARIADB_ROOT_PASSWORD: dashboard
      MARIADB_DATABASE: dashboard
      MARIADB_USER: dashboard
      MARIADB_PASSWORD: dashboard
    healthcheck:
      test: ["CMD", "healthcheck.sh", "--connect", "--innodb_initialized"]
      interval: 10s
      timeout: 5s
      retries: 3
    ports:
      - "3306:3306"
    volumes:
      - db-data:/var/lib/mysql
volumes:
  db-data:

型