docker compose for rails app

docker-compose.yml

version: '3'

services:
  memcached:
    image: memcached:1.5-alpine
    volumes:
      - memcache:/data

  db:
    image: mysql:5.7
    environment:
      MYSQL_ALLOW_EMPTY_PASSWORD: 'yes'
    volumes:
      - db:/var/lib/mysql

  redis:
    image: redis
    volumes:
      - redis:/data

  web:
    build:
      context: .
      dockerfile: Dockerfile
    command: bash -c "rm -f shared/pids/puma.pid && bundle exec rails s -b '0.0.0.0'"
    volumes:
      - .:/home/app/avocado
      - bundle:/usr/local/bundle
    tmpfs: /home/app/avocado/tmp
    ports:
      - "3000:3000"
    depends_on:
      - db
      - redis
      - memcached

    environment: &sys_rails_env
      RAILS_ENV: 'development'
      REDIS_URL: 'redis://redis:6379/12'
      DATABASE_HOST: 'db'
      DATABASE_NAME_DEVELOPMENT: 'avocado_docker_dev'
      MEMCACHED_SERVER: 'memcached:11211'
      ASSET_HOST_URL: 'http://localhost'
      HOST: 'http://localhost'

  sidekiq:
    build:
      context: .
      dockerfile: Dockerfile
    command: bundle exec sidekiq -C config/sidekiq.yml
    depends_on:
      - db
      - redis
      - memcached

    environment:
      <<: *sys_rails_env

volumes:
  db:
  redis:
  bundle: