lamine_wp/web/app/mu-plugins/disallow-indexing.php

<?php
/**
 * Plugin Name:  Disallow Indexing
 * Plugin URI:   https://github.com/roots/bedrock/
 * Description:  Disallow indexing of your site on non-production environments.
 * Version:      1.0.0
 * Author:       Roots
 * Author URI:   https://roots.io/
 * License:      MIT License
 */

if (defined('WP_ENV') && WP_ENV !== 'production' && !is_admin()) {
    add_action('pre_option_blog_public', '__return_zero');
}