At the moment they are in the process of moving things from the frontend configuration to a backend endpoint. The documentation still hasn't been updated and it seems like the project has several moving parts—probably best to leave this alone for now.
Currently, we are stuck on a version of korp-frontend from 18 jan 2022. Upgrading to one of the later versions entails (AFAIK):
They have created a separate repository containing their own configuration which might be helpful.
At the moment they are in the process of moving things from the frontend configuration to a backend endpoint. The documentation still hasn't been updated and it seems like the project has several moving parts—probably best to leave this alone for now.