text: <html lang="en">
    <head>
      <meta charset="utf-8">
      <meta http-equiv="X-UA-Compatible" content="IE=edge">
      <meta name="viewport" content="width=device-width, initial-scale=1">
      <title>403 Forbidden</title>
      <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
      <style type="text/css">
        h1 {
          font-size: 1200%;
          font-weight: 900;
        }
        #error-page {
          padding-top: 10%;
          text-align: center
        }
      </style>
  </head>
  <body>
    <div class="container">
      <div class="row">
          <div id="error-page" class="col-md-12">
              <h1>403</h1>
              <h2>You are not authorized to view this page</h2>
              <br>
              <a class="btn btn-primary" href="/">Return to the main page</a>
          </div>
      </div>
    </div>
  </body>
  </html>
  