Add docs about auth approach #94

bin/server.js

@@ -20,6 +20,7 @@ wss.on('connection', setupWSConnection)
 
 server.on('upgrade', (request, socket, head) => {
   // You may check auth of request here..
+  // See https://github.com/websockets/ws#client-authentication
   /**
    * @param {any} ws
    */