Hotfix chat server on production
!734 (merged) added a new endpoint /is-connected
to the chat server. On the website only the production version of the chat server is used and thus this endpoint does not exists yet. In addition, the requests are not properly validated and create messages like 42[null,{"m":null,"o":null}]
which currently crash the app (since messages are not properly validated in the socket.io java library).
In addition, this should fix the online status (#832 (closed))
Related Slack thread: https://yunity.slack.com/archives/C1T1ZM9A4/p1585088263106100