docker-compose.yml

version: "2"
services:
  db:
    image: mariadb:10.2
    environment:
      - MYSQL_DATABASE=plots
      - MYSQL_USER=plots
      - MYSQL_PASSWORD=plots
      - MYSQL_RANDOM_ROOT_PASSWORD=true
    volumes:
      - ./config/my.cnf:/etc/mysql/my.cnf
      # for configuration 
      - ../mysql:/var/lib/mysql
      # for persistence
      - ../dump:/docker-entrypoint-initdb.d
      # for importing a dump
      # if you want to re-import simply put away ../mysql/*
  web:
    build: .
    command: /bin/bash -c "sleep 5 && passenger start -p 4000"
    environment:
      - RAILS_ENV=${RAILS_ENV}
      - SECRET_KEY_BASE=${SECRET_KEY_BASE}
    volumes:
      - .:/app
    ports:
      - "127.0.0.1:4000:4000"
    links:
      - db
    restart: unless-stopped