[Feature Request] Add environment variables for authentication

[CygnusHyoga]

I would be nice to have environment variables for authentication, to be able to deploy the container and be able to use the application without having to configure anything manually.

I have seen that the FORCE_JELLYFIN_SERVER_URL variable has been added recently. It would be great to add two (or more) environment variables for authentication. For example:

JELLYFIN_SERVER_USERNAME=xxx
JELLYFIN_SERVER_PASSWORD=xxx

Another suggestion for authentication, is to add jellyfin environment variable for API KEY to simplify the authentication.

JELLYFIN_SERVER_APIKEY=xxx

Thanks!

[johnpc]

Unfortunately Api Key authentication doesn't work for this app, because Api Keys are bound to the entire instance, not any particular user. Auth tokens are used instead.

I could add env vars for Auth Token / Username / Password though.