Add frontend 2.0

frontend/index.html

@@ -8,8 +8,9 @@
     <link rel="stylesheet" href="https://rsms.me/inter/inter.css">
     <title>NVLS | Covergen</title>
   </head>
-  <body>
+  <body class="bg-gray-200">
     <div id="app"></div>
+    <script src="/wasm_exec.js"></script>
     <script type="module" src="/src/main.ts"></script>
   </body>
 </html>