message: chore(content): update fake index.html
diff: <!DOCTYPE html>
  <html>
  <head>
  + <meta name="viewport" content="width=device-width, initial-scale=1">
  <meta charset="utf-8">
  <title>Saladict</title>
  </head>
  <body>
  - <div id="app"></div>
  + <div id="root"></div>
  <!-- built files will be auto injected -->
  </body>
  </html>
  