docker-compose.yml

version: '2'
services:
  web:
    build: .
    command: bundle exec rails s -p 3000 -b '0.0.0.0'
    volumes:
      - .:/myapp
    ports:
      - "3000:3000"
    depends_on:
      - redis
      - db
    env_file:
      - myapp.env
  redis:
    image: redis
  sidekiq:
    build: .
    command: bundle exec sidekiq
    depends_on:
      - redis
    env_file:
      - myapp.env
  db:
    image: mysql
    ports:
      - "3306:3306"
    environment:
      MYSQL_ROOT_PASSWORD: xxx
      MYSQL_USER: xxx

FROM ruby:2.3.3
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs
RUN mkdir /myapp
WORKDIR /myapp
COPY Gemfile /myapp/Gemfile
COPY Gemfile.lock /myapp/Gemfile.lock
RUN bundle install
COPY . /myapp