1. I couldn’t find the entrance so I directly searched for zero

2. Create tunnel, name whatever you want, install cloudflared according to documentation

3. Settings
subdomain: fill in whatever you want
domain: select your bound domain
path: leave empty
Type: selected HTTP
URL: 0.0.0.0:3000

4. Use Tailscale to connect VPS and Mac mini
User -> Cloudflare -> VPS <-> Tailscale <-> Mac mini Seems a bit more stable, haven’t tested
Complete
It’s just that simple
URL can be changed anytime