GPS support

[Gaz492]

Any plans to support passing a GPS dongle into this?

[dziban303]

Since ultrafeeder uses wiedehopf's fork of readsb, I believe that's already possible by using gpsd to talk to the GPS dongle outside of docker, and using the net_connector syntax pointing to your Pi's IP.

...
    environment:
      - READSB_NET_CONNECTOR=<your Pi's IP>,2947,gpsd_in
...

On a bare metal system it'd point to localhost, but I don't think localhost will work within the container so you'll probably need to use your Pi's IP address instead.