processor:
  build: .
  volumes:
    - .:/myapp
  ports:
    - "3000:3000"
  external_links:
    - champaign_db_1
  environment:
    PG_USERNAME: postgres
    PG_HOST: champaign_db_1
  env_file:
    - env.yml

db:
  image: postgres
  ports:
    - "5432"
  environment:
      POSTGRES_DB: champaign

processor:
  build: .
  volumes:
    - .:/myapp
  ports:
    - "3000"
  external_links:
    - champaign_db_1
    - champaign_redis_1
  environment:
    PG_USERNAME: postgres
    PG_HOST: champaign_db_1
  env_file:
    - env.yml

Use redis ran by champaign with an external link
Use redis ran by champaign with an external link
