feat: synchronize colors between clients

index.html

@@ -1,7 +1,9 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
     <head>
         <title>Hello websockets</title>
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=device-width,initial-scale=1.0">
     </head>
     <body style="margin: 0; padding 0; overflow: hidden; background-color: #000000">
         <canvas id="game" width="800" height="600"></canvas>