A super-simple WebSocket server that relays messages from a client to all other clients in its room.
Rooms are determined by the HTTP request target of the connecting client.
For example, establishing a connection to wss://trudeaugamedev-relay.herokuapp.com/happycoolplace/test will place the client in a room with the name /happycoolplace/test.
This client will then only be able to send and receive relayed messages with clients also connected to the /happycoolplace/test room.