index.html

<!doctype html>
<html>
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Builder</title>
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.5/css/bootstrap-flex.min.css" rel="stylesheet" >
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" >
    <link rel="stylesheet" href="./styles.css" >
  </head>
  <body>
    <div id='app'>
    </div>
    <script src="/dist/bundle.js"></script>
  </body>
</html>