I run dockerized home assistant, node red, mosquitto and zigbee2mqtt on a repurposed 2013 mac mini with ubuntu. It is my server dedicated to smart home stuff.

I started with unifying my zigbee devices so that I would need only one dongle, using zigbee2mqtt. Very quickly came home assistant and node red (node red being the brain for everything, home assistant being mostly the UI and sensor/device-exposer. I can recommend customizing the home assistant dashboard to make it look and feel better.