templates/uploadfile.html

<!DOCTYPE html>
<html>
<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>FutureBoard - Upload</title>

  <link rel="stylesheet" type="text/css" href="/static/vendor/materialize.min.css">
  <!-- load Materialize js -->
  <script src='/static/vendor/materialize.min.js' charset="UTF-8" type="text/javascript"></script>

  <!-- load Materialize icons -->
  <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">

  <!-- load CSS -->
  <link rel="stylesheet" type="text/css" href="/static/css/upload.css">
  <link rel="stylesheet" type="text/css" href="/static/vendor/dropzone.css">
  <!-- load vendor js -->
  <script src="/static/vendor/jquery.min.js" charset="UTF-8" type="text/javascript"></script>
  <script src="/static/vendor/dropzone.js"></script>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
  <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js"></script>

  <!-- load js -->
  <script src="/static/js/uploadfile.js" charset="UTF-8" type="text/javascript"></script>

</head>

<body>

  <div class="container">
    <div class="row">

      <nav class="col s12">
        <div class="nav-wrapper">
          <a class="brand-logo"><i class="material-icons hide-on-small-only">fast_forward</i>FutureBoard: Upload</a>
        </div>
      </nav>

      <!-- Dropzone automatically runs on a form with the "dropzone-input" id -->
      <form action="/file-upload" class="dropzone hoverable col s12" id='dropzone-input'>
        <div class="fallback">
          <input name="file" type="file" multiple />
        </div>
      </form>

      <progress id="progress" value="0">
      </progress>

      <label for="description">Description <span>Who are you? Where is the media from? Anything else?</span></label>
      <input id="description" type="text" name="description" placeholder="Some text">

      <button type="submit" name="action" class="col s12 btn-large btn waves-effect waves-light submit" disabled="disabled" id="submit-button">
        <i class="material-icons">send</i> SUBMIT
      </button>
    </div>

  </div>
</body>

</html>