Slower moving traffic should be on the right. So to pass someone you should need to move to the left lane. In some states in the US it is also illegal to be in the left lane unneeded, and I known of cops that would use the justification of being in the left lane to pull someone over even if it not illegal.
Depending on how many people you want connected, could try something like tailscale or zerotier. I been using tailscale and I think it is easier.
The closest one I know of is scuttlebutt.
I don’t know the full answer, but the surgeon would not be the only doctor in the room. There would at least be an anesthesiologist, and supporting nurses.
As far as I known, subsonic is currently closed source and other reimplemented the api with open source programs. Than some people got together to make a standard that was not tied to a closed source programs.
https://opensubsonic.netlify.app/