index.html

## index.html
<!DOCTYPE html>
<html>

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width,initial-scale=1">
  <title>My Application</title>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO"
    crossorigin="anonymous">
  <link rel="stylesheet" href="css/signin.css">

</head>

<body>

  <div id="app">
    <router-view></router-view>
  </div>

  <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/parse/2.0.1/parse.min.js"></script>
  <script src="https://unpkg.com/vue-router/dist/vue-router.js"></script>
  <script src="js/app.js"></script>
</body>

</html>