GitHub's Oauth2 addition

[kimllee]

Hi,

Claude created me everything we need to use Github's oauth2 auth with flatnotes-enhanced. It's fully functionnal on local.
Are you interested in a PR of this ?

It displays the logo "connect to github" only when the env var FLATNOTES_AUTH_TYPE is set to oidc. Once logged, we also can use the LogOut button of the app.

[BobWs]

Thank you for building this! I really appreciate the effort.

However, I have a concern. GitHub-only OAuth2 would work for some users, but others use Google, Authelia, PocketID (which I personally use), or other providers.

I don't want to add multiple provider-specific logins one by one. The right solution is generic OIDC (OpenID Connect) – one implementation that works with GitHub, Google, Authelia, PocketID, and any other OIDC-compatible provider.

This is a larger feature that I have planned for the future, but I'm not ready to implement it yet.

Would you be open to adapting your work into a generic OIDC solution? If not, I may hold off on merging a GitHub-only implementation.

Thank you again for your contribution – it means a lot! 🙏

[kimllee]

Hi, Github is only using Oauth2. I don't really use for now oidc because I don't really want to manage the users however I also have a keycloak Instance which I (Claude AI) could use for trying to implement oidc too.
I also know that I could use Keycloak with Identity Providers as Google.

Will try soon :)