Update script source paths to relative URLs

Author: yejunweb

index.html

@@ -100,7 +100,7 @@
             <div id="error-message" class="error"></div>
         </div>
 
-        <script src="/index.js" type="module"></script>
-        <script src="/utils.js" type="module"></script>
+        <script src="./index.js" type="module"></script>
+        <script src="./utils.js" type="module"></script>
     </body>
 </html>