JupyterLab User Settings File

I couldn't find any documentations, however in your folder ~/.jupyter/lab/user-settings/@jupyterlab if you create a custom notebook configuration (for instance), you will have a file created in notebook-extension/tracker.jupyterlab-settings.

You can copy the folder(s) you want to use for each of your container in this location, then when you start a jupyter lab, you should see the custom configuration(s) loaded correctly.

Settings for extensions are documented here:

https://jupyterlab.readthedocs.io/en/stable/user/extensions.html#settings

In short, you can supply and overrides.json in <sys-prefix>/share/jupyter/lab/settings where <sys-prefix> can be found by running jupyter lab path.

The example from the docs shows an overrides.json like this:

{
  "@jupyterlab/apputils-extension:themes": {
    "theme": "JupyterLab Dark"
  }
}

Running jupyter-lab --generate-config should generate a config file in /home/<USER>/.jupyter/jupyter_notebook_config.py