added dockerfile and updated Readme

index.html

@@ -4,7 +4,7 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta name="theme-color" content="#2c3e50">
-    <title>Multi-Player Chess Timer</title>
+    <title>Game Timer</title>
     <link rel="manifest" href="manifest.json">
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.2/css/all.min.css">
     <link rel="stylesheet" href="styles.css">
@@ -85,5 +85,12 @@
 
     <script type="module" src="audio.js"></script>
     <script type="module" src="apps.js"></script>
+    <script>
+        if ("serviceWorker" in navigator) {
+          navigator.serviceWorker.register("/sw.js")
+            .then(() => console.log("Service Worker Registered"))
+            .catch((err) => console.log("Service Worker Failed", err));
+        }
+      </script>     
 </body>
 </html>