Docker Compose is Cool!

docker-compose.example.yml

nginx:
    build: ./loadbalancer
    links:
        - api
        - messenger
    ports:
        - "80:80"
        - "443:443"
api:
    build: ./api
    ports:
        - "8000:8000"
messenger:
    build: ./messenger
    ports:
        - "9000:9000"