I would be delighted to see Netdata in Cloudron.
I have been using Netdata for many years now for about 50 servers.
My experience:
Netdata is a great tool for analysing the load on a machine, in real time or in the aftermath of a problem. Netdata itself is relatively resource-efficient.
Initially, I was irritated by the fact that the UI is very much geared towards using netdata.cloud. For example, there is a conspicuous "log in" button that takes you directly to the cloud (which has been payable for a few months now). Once you have registered the agent there, it is not so easy to get it out.
What is perhaps not so clear from the documentation is that the agent to be installed on the client can also act as a master and collect data from many clients. And completely without netdata.cloud.
As the Netdata UI is publicly accessible in the opensource version, protection via proxy is recommended, similar to https://learn.netdata.cloud/docs/netdata-agent/configuration/running-the-netdata-agent-behind-a-reverse-proxy/nginx
However, the question for me is in what context Netdata should be integrated into Cloudron. As an agent in the apps? As an agent on the host system? As a "monitoring master" app to monitor other servers/containers?