Quick hack for relaying local ros topics to a remote rosbridge master.

This works on ros-melodic, you can change it to build using other ros-distro's easily by editing the Dockerfile.

To run, make sure you have docker installed and simply run the command `docker compose up --build` from the root
of this repository. You can also run `docker compose up --build --detach` to run it in the background.

Configuration is set in the `docker-compose.yaml`. This includes what topics to relay, and a TOPIC_PREFIX
which should be unique for each drone.