How do you create a Webhook for Github Enterprise? There is a notion of doing it on the documentation but after reading the source code I don’t see a configuration option to bypass the Github base URL:

Diagnostics:
  github:index:RepositoryWebhook (github-repo-webhook):
    error: POST <https://api.github.com/repos//https://><snip>/security/jupyterhub.git/hooks: 404 Not Found []

Is there an environment variable I can set somewhere?