view.html.erb

<p>
  If you see <code>Failed to connect to ...</code>, then wait a few seconds
  before trying the <strong>Connect to Jupyter</strong> button again. This
  warning appeared because the Jupyter Notebook is still starting up.
</p>

<form action="/node/<%= host %>/<%= port %>/login" method="post" target="_blank">
  <input type="hidden" name="password" value="<%= password %>">
  <button class="btn btn-primary" type="submit">
    <i class="fa fa-eye"></i> Connect to Jupyter
  </button>
</form>