This is my sort of mobile server. It's a pi 5 with a hyperpixel 4. I am not using a router since I don't need too, this just provides some small services and connects directly to my hotspot/hotel wifi. I runtipi, code server, Adguard (fallback Adguard if my main server dies or is powered off), uptime kuma, portainer and olivetin. Of course everything happens through tailscale. Although I would love to add a small router and SSD in the future.