docker-compose with build args

docker-compose.yml

version: '2'
services:
  app:
    build:
      context: .
      args:
        - BUNDLE_WITHOUT=
        - RAILS_ENV=development
    links:
      - database
    ports:
      - "3000:8080"
    env_file:
      - .env
    volumes:
      - .:/app
    tty: true
    stdin_open: true