How to deploy Docker container using .do/deploy.template.yaml

👋🏼 @CameronSeattle

I realize this is not very clear. .do/app.yaml is an unofficial path commonly used to store app specs in git repos, however, it is not used by App Platform at all.

deploy.template.yaml follows the exact same syntax as a regular App Spec, except it is nested under a spec: key. As an example, here is a deploy button template for a Dockerfile service:

spec:
  name: sample-dockerfile
  services:
  - name: dockerfile-service
    dockerfile_path: Dockerfile
    git:
      branch: main
      repo_clone_url: https://github.com/digitalocean/sample-dockerfile.git