text: Title: --base-image not recognise as valid argument
  Body: Related with https://github.com/jupyterhub/repo2docker/issues/487
  
  https://github.com/jupyterhub/repo2docker/blob/247e9535b167112cabf69eed59a6947e4af1ee34/repo2docker/app.py#L450 should make `--base-image` a valid argument for `repo2docker` but I'm getting
  
  ```
  repo2docker: error: unrecognized arguments: --base-image
  ```
  
  with
  
  ```
  $ repo2docker --version
  2023.06.0
  ```