feature: clarification in OIDC instructions like Keycloak for example

[Khyretos]

Is your feature request related to a problem? Please describe.

no.

Describe the solution you'd like.

clarifications on redirect URI when enabling OIDC.

Describe alternatives you've considered.

No response

Additional context

I started setting up keycloak (an open_id provider) with my selfhosted penpot instance and i was struggling with the instructions as they where not clear in how to implement it.

after debugging a lot i found that these where the settigns that for me needed some clarifications:

• OIDC provider: redirect uri in the provider should be <DOMAIN>/api/auth/oauth/oidc/callback
• PENPOT configuration: PENPOT_OIDC_BASE_URI: https://<DOMAIN>/realms/<REALM>/

if this is not done properly the redirect url can appear empty when penpot tries to redirect which causes this:

as i am new to OIDC and i have implemented this for several of my containers:

• gitlab
• portainer
• taiga

i was very frustrated as to why it was not redirecting and maybe its common knowledge but it never hurts to add the additional information. And if it already was specified somewhere then excuse me for my ignorance.