docker-compose.yml

# docker-compose.yml
version: '2'
services:
  loadbalancer:
    image: dockercloud/haproxy
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    ports:
      - 80:80
    links:
      - webapi

  postgresql:
    image: postgres
    environment:
      - POSTGRES_USER=railsapi
      - POSTGRES_DB=railsapi_production
      - POSTGRES_PASSWORD
      
  webapi:
    build: .
    restart: always
    depends_on:
      - postgresql
    environment:
      - POSTGRES_PASSWORD
      - SECRET_KEY_BASE
      - RAILS_ENV=production
      - RAILS_LOG_TO_STDOUT=true