index.html

<!doctype html>
<html>
  <head>
    <title>Form</title>

    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />

    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous" />
  </head>
  <body>
    <div class="container">
      <div id="point">app mount point</div>
    </div>
    <script type="text/javascript" src="build/dev/main.js"></script>
  </body>
</html>