Using playit.gg with TrueNAS scale server

So, I successfully setup a connection from my TrueNAS scale server to playit.gg by running it in a seperate docker container (wisdomsky/playit-docker-web). I just open my browser and type in my server-IP with the according port and there is my "claim-link". I click it and everything is setting itself up as it would on windows.

Everything working fine so far. But when I restart my server, the connection is lost and I have to setup a new agent with a new claim.

Is there a way to have it connect again without having to set up a new agent? I'd love to even have a premium subscription, but need to know, if I can have this running without the need of setting this up over and over again, when restarting the machine.