Add Cusdis Comments Shortcode to Static Wordpress Site

functions.php

/**
 * Make sure to replace your APP_ID with the value from your hosted Cusdis instance.
 * You can grab it from your embed code or from your URL https://cusdis.com/dashboard/project/{{ APP_ID }}
 */

function cusdis_comments_shortcode()
{
    $page_id = get_the_ID();
    $page_url = get_permalink($page_id);
    $page_title = get_the_title($page_id);
    return '<div id="cusdis_thread"
        data-host="https://cusdis.com"
        data-app-id="{{ APP_ID }}"
        data-page-id="' . $page_id . '"
        data-page-url="' . $page_url . '"
        data-page-title="' . $page_title . '"
        ></div>
        <script async defer src="https://cusdis.com/js/cusdis.es.js"></script>
        ';
}

add_shortcode('cusdis', 'cusdis_comments_shortcode');