- service: app
  type: serial
  image_name: alinuxninja/postal
  registry: https://index.docker.io/v1/
  encrypted_dockercfg_path: dockercfg.encrypted
  steps:
  - command: docker tag alinuxninja/postal alinuxninja/postal:latest
  - command: docker push alinuxninja/postal
- service: app
  type: serial
  image_name: alinuxninja/postal
  registry: https://index.docker.io/v1/
  encrypted_dockercfg_path: dockercfg.encrypted
  steps:
  - command: docker tag alinuxninja/postal alinuxninja/postal:$(git rev-parse --short $(git ls-remote https://github.com/atech/postal.git refs/heads/master | awk '{print $1}'))
  - command: docker push alinuxninja/postal