@humptydumpty to reliably update i ended up always updating the docker tag to the desired version. With the tag updated you just need to run flyctl deploy again.
Right.. It seems there are many candidates zabbix, netdata, some SNMP thing I forget etc. I prefer simply making sure Cloudron "works" with these existing software. It's why we added a way to open up the firewall as well. Happy to make any more fixes required to make these things work more easily.
If I understand correctly, you are asking for some netdata configuration. I will leave it open anyway in case some of our forum users can help. But maybe it's better suited in their forum.