docker-compose.yml

# https://phraseapp.com/blog/posts/unifying-rails-environments-docker-compose/

version: '3'
services:
  app: &app
    build:
      context: .
      dockerfile: Dockerfile
    volumes:
      - .:/app

    # use tmpfs for tmp and log for performance and to allow
    # multiple builds in parallel. Both directories are mounted
    # into the image AFTER the working directory is mounted.
    tmpfs: ["/app/tmp", "/app/log"]

    environment:
      RAILS_ENV: "development"
      #DATABASE_URL: "sqlite3::memory:"
      #DATABASE_URL: "mysql2://mysql/reality?local_infile=true"
  # depends_on:
  #   - mysql

    command: ["bundle", "exec", "./build/validate-migrated.sh && rails server -b 0.0.0.0"]
    ports: ["3000:3000"]

  # mysql: &mysql
  #   image: mysql:5.6.35
  #   ports: ["3306"]
  #   environment:
  #     MYSQL_ALLOW_EMPTY_PASSWORD: "true"
  #     MYSQL_DATABASE: "reality"
  # 
  #   healthcheck:
  #     test: ["CMD", "mysql", "-u", "root", "-e", "select 1"]
  #     interval: 1s
  #     timeout: 1s
  #     retries: 300