Geo tracking and geo fencing in Node-RED with a map page available on the LAN or via VPN through a reverse proxy. The flow supports output triggers for me (or any other tracked entity) entering or leaving a defined geo fenced area. Oh, I've injected synthetic test data - I am not really standing on the top of the O2 Arena!

I found this really cool FOSS Android app to use to send in the tracking data via secure API: https://colota.app/