Full width stream of Instagram posts on a WordPress frontpage

front-page.php

<?php 
// Into front-page.php; exact location depends on the theme, e.g. just before sth. like:
// <div id="sidebar-footer" class="footer-widget-area clearfix" role="complementary">
if ( is_active_sidebar( 'instagrid_full_width' ) ) : ?>
	<div id="instagrid" class="site-content">
		<?php dynamic_sidebar( 'instagrid_full_width' ); ?>
	</div><!-- #instagrid -->
<?php endif; ?>

functions.php

<?php
// Register custom widget area for Instagram.
// Could reside inside e.g. functions.php of a child theme or in a custom plugin.
function theme_add_my_instagrid() {

	$args = array(
		'id'            => 'instagrid_full_width',
		'name'          => 'Instagram Feed Container',
		'description'   => 'Container for the Instagram-Widget.',
		'before_title'  => '<h3 class="widget-title">',
		'after_title'   => '</h3>',
	);
	register_sidebar( $args );

}
add_action( 'widgets_init', 'theme_add_my_instagrid' );
?>