The Simon Relay Server. It relays.
Connect to a websocket with the path http://{server}/{game_id}
Once connected, and every time someone else connects or disconnects, you will receive a user state message:
{
"type": "users",
"count": 5
}
Indicating how many users are currently connected to your game.
Every message you will send the websocket will be relayed as is to the other clients