/.container-fluid -->
    </section>

    <!-- Main content -->
    <section class="content">
      <div class="container-fluid">
        <div class="row">
          <div class="col-md-3">
            <div class="sticky-top mb-3">
              <div class="card">
                <div class="card-header">
                  <h4 class="card-title">Draggable Events</h4>
                </div>
                <div class="card-body">
                  <!-- the events -->
                  <div id="external-events