Thanks for the new ONLYOFFICE 7.3 and the nice new features.
We just test the new version. We found a issue regarding the proxy configuration.
The path of the websockets seems to be changed so that your example does not match the current situation:
This change also breaks the current reverse proxy configurations that based on your old/current examples.
Is it possible to change this path back to /websocket?
Or have we made a mistake (we use Docker)?