implement hello message with player id

index.html

@@ -4,7 +4,8 @@
         <title>Hello websockets</title>
     </head>
     <body>
-	<canvas id="game" width=800 height=600></canvas>
+        <canvas id="game" width=800 height=600></canvas>
+        <h1 id="title">Offline</h1>
     </body>
     <script type="module" src="client.mjs"></script>
 </html>