[ENH] - Ability to pass environment variables to custom apps

[aktech]

Feature description

Currently custom apps aren't able to be created with user supplied environment variables.

Value and/or benefit

To be able to deploy variety of apps with like for example to be able to supply something like:

• BOKEH_ALLOW_WS_ORIGIN for custom panel apps
• OPENAI_API_KEY for custom AI apps

Anything else?

No response

[aktech]

We'll handle it in the next release @dharhas

[Adam-D-Lewis]

Maybe this could be done with conda store (not sure if it should)? I believe conda envs support setting env vars (https://stackoverflow.com/a/62508395/9848141), but I'm not sure if conda store supports it.

[aktech]

Maybe this could be done with conda store (not sure if it should)?

jhub-apps should work with any JupyterHub installation and conda-store is specific to Nebari. By the way I have just added it in the API in this PR: #107 (frontend is pending though)

[aktech]

This is done.