/sing-app/html-bs4/"
                           target="_blank">
                            <i class="fa fa-facebook pl-1"></i>
                        </a>
                    </div>
                </div>
            </div>
        </section>
    </div>

    <div class="content-wrap">
        <!-- main page content. the place to put widgets in. usually consists of .row > .col-lg-* > .widget.  -->
        <main id="content" class="content" role="main">
            <!-- Page content -->
        <ol class="