front-page.php

<?php get_header(); ?>

    <!-- Main jumbotron for a primary marketing message or call to action -->
    <div class="jumbotron">
      <div class="container">

      <?php if ( have_posts() ) : while (have_posts() ) : the_post(); ?>

      <?php the_content(); ?>

      <?php endwhile; endif; ?>

      </div>
    </div>

    <div class="container">
      <!-- Example row of columns -->
      <div class="row">
        <div class="col-md-4">
          
        <?php if (dynamic_sidebar ( 'front-page-left' )); ?>

        </div>

        <div class="col-md-4">

        <?php if (dynamic_sidebar ( 'front-page-middle' )); ?>

       </div>
        <div class="col-md-4">
        
        <?php if (dynamic_sidebar ( 'front-page-right' )); ?>
        
        </div>
      </div>

      <hr>
<?php get_footer(); ?>