I recently made my main computer (i7 10700, RX 6750 XT and 32GB of RAM) into a Proxmox server that runs everything including Docker, OPNSense, Unbound (from within OPNSense) and a lot more.

I have my old Pi Zero 2 W and I'd like to use it for something, but don't know what.

So the question is, what can be hosted on a weak system with few resources that is useful. It also has to be something that would benifit from being hosted on a different system than my main server.