Mini PC with celeron N100, with umbrel installed on it.

But seriously thinking on removing it and run proxmox with a VM for Bitcoin sandboxed on it along with other tool like Dojo (wondering if I could run a ronin dojo with proxmox 🤔), and probably another VM one for Casa/Zima OS, thus separating the node from the services, and adding LXCs.

Umbrel is terrible AF handling authentication from services exposed with services like clouflare tunnel.