anchor.diff:      volumes: ["./keys/worker:/concourse-keys"]
       environment:
         CONCOURSE_TSA_HOST: web:2222
  -      CONCOURSE_GARDEN_NETWORK: "true"
         CONCOURSE_EPHEMERAL: "true"
         CONCOURSE_GARDEN_DNS_SERVER: 8.8.8.8
       dns:
  
positive.code:       - 8.8.4.4
  
    worker:
      image: concourse/concourse:4.2.2
      command: worker
      privileged: true
      links: [web]
  
negative.code:      - /data/concourse/postgres-data:/var/lib/postgresql/data
  
    web:
      image: concourse/concourse:5
      command: web
      links: [db]
      depends_on: [db]
  