Your repo config file can "extend" an existing config file that lives somewhere else. This makes it easy re-use configurations across your organization and/or base your configuration off of a template.
Templates need to be accessible via a URL. Any publicly accessible HTTPS URL
will work. You can also point us to a private GitHub repo URL within the same
organization where the GitHub App is installed (e.g. https://api.github.com/repos/example/pullapprove-config/contents/.pullapprove.yml).
# you need at least these 2 fields to extend a template
version: 3
extends: https://api.github.com/repos/example/pullapprove-config/contents/.pullapprove.yml