      </div>
                  </div>
                </li>
                <li class="nav-item">
                  <a class="nav-link" data-toggle="collapse" href="#menu-3" role="button" aria-expanded="false" aria-controls="menu-3">Configuration</a>
                  <div class="collapse" id="menu-3" data-parent="#page-nav">
                    <div>
                      <ul class="nav flex-column">
                        <li class="nav-item">
                          <a class="nav-link" href="config.ht