[bug]: cannot use github as auth login method

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

ref: https://github.com/makeplane/plane/issues/8100

this is still an issue. was able to reproduce using makeplane/plane-aio-commercial:v2.1.1 docker container. followed the https://developers.plane.so/self-hosting/methods/docker-aio guide.

https://github.com/user-attachments/assets/7666a2b0-f60b-4c34-a259-0028956f8d93

Steps to reproduce

1. setup and deploy makeplane/plane-aio-commercial:v2.1.1 self hosted
2. enter /god-mode/ and attempt to setup github login
3. attempt to toggle on
4. go to workspace and see that GitHub oauth is not there

I also followed #8100's recommended instructions and manually set IS_GITHUB_ENABLED=1 and redeploy then it does show up, however the generated redirect URL to github is incorrect. I have my deployment behind a proxy and it currently attempts to use the private *.flycast domain name. the INTEGRATION_CALLBACK_BASE_URL does nothing regarding this too.

https://github.com/user-attachments/assets/53813a9e-4eeb-4695-a170-87f464cc3b0c

Environment

Production

Browser

Google Chrome

Variant

Self-hosted

Version

v2.1.1