https://hub.docker.com/_/ghost/ の docker-compose.yaml あれこれ

stack.yml

# by default, the Ghost image will use SQLite (and thus requires no separate database container)
# we have used MySQL here merely for demonstration purposes (especially environment-variable-based configuration)

version: '3.1'

services:

  ghost:
    image: ghost:3-alpine
    platform: linux/amd64
    restart: always
    ports:
      - 3001:2368  # 8080 はよく使うので変更した
    environment:
      # see https://ghost.org/docs/config/#configuration-options
      database__client: mysql
      database__connection__host: db
      # database__connection__port: 3306
      database__connection__user: root
      database__connection__password: example
      database__connection__database: ghost
      # this url value is just an example, and is likely wrong for your environment!
      url: http://localhost:3001    # 8080 はよく使うので変更した
      # contrary to the default mentioned in the linked documentation, this image defaults to NODE_ENV=production (so development mode needs to be explicitly specified if desired)
      #NODE_ENV: development
    depends_on:  # たまにしかDB接続に成功しないので足した。
      - db

  db:
    image: mysql:5.7
    platform: linux/amd64
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: example