<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<?php
/**
* The template for displaying the footer
*
* Contains the closing of the #content div and all content after.
*
* @link https://developer.wordpress.org/themes/basics/template-files/#template-partials
*
* @package WordPress
* @subpackage Twenty_Nineteen
* @since 1.0.0
*/
?>
</div><!-- #content -->
<p>this is footer part </p>
</div><!-- #page -->
<?php wp_footer(); ?>
</body>
</html>