Updated docs have moved to the MeshChat repo, this copy has been left here for reference.
https://github.com/liamcottle/reticulum-meshchat/blob/master/docs/meshchat_on_raspberry_pi.md
Simple guide to install MeshChat on a Raspberry Pi.
This would allow you to connect an RNode (such as Heltec v3) to the Pi via USB, and then access the MeshChat Web UI from another machine.