Adjust expiration on HTML to prevent WP Rocket issue with DreamPress Varnish cache

rocket-dreampress-expires.php

<?php

add_filter('rocket_htaccess_mod_expires', 'wp_rocket_adjust_html_expire_dreampress');
/**
 * Adjust expiration on HTML to prevent issue with Varnish cache
 *
 * @param string $rules htaccess rules.
 * @return Updated htaccess rules
 */
function wp_rocket_adjust_html_expire_dreampress( $rules ) {
        $rules = str_replace(
                'ExpiresByType text/html                 "access plus 0 seconds"',
                'ExpiresByType text/html                 "access plus 1 hour"',
                $rules
        );
        return $rules;
}