Cool! I should say most of PolyChat is open source at https://github.com/open-webui - just the combo models and payment are closed source right now. Open to arguments on making PolyChat fully open source as well!
(Another annoying thing about OWUI is getting logged out every time the image upgrades… is that something else you’ve looked at?)
The upgrade/logout issue you're facing is likely due to not setting WEBUI_SECRET_KEY outside of your docker container. This causes all previous cookies to be unreadable as a new key will get generated by start.sh and won't decrypt the old cookies.