service: app
image: dhh/app
servers:
  web:
    - 1.1.1.1
    - 1.1.1.2
  workers:
    hosts:
      - 1.1.1.3
      - 1.1.1.4
env:
  REDIS_URL: redis://x/y
registry:
  server: registry.digitalocean.com
  username: user
  password: pw