npm run server
Will start the service on port 8080 (you're free to change the port) and will accept socket.io connections using default settings.
On initial connection the socket.io client will receive cars event with all cars in the following format:
[
{"id":7,"name":"Car 7","lat":54.629796087903216,"lng":18.900004673694244},
{"id":6,"name":"Car 6","lat":54.726860675942255,"lng":18.904665864862093}
]Afterwards updates to cars positions will be emited with carPositionChanged event e.g.
{"id":7,"name":"Car 7","lat":54.629798087903216,"lng":18.900004673694244}