new things.

web/sites/default/default.settings.php

@@ -181,8 +181,8 @@ $databases = [];
  *
  * WARNING: The above defaults are designed for database portability. Changing
  * them may cause unexpected behavior, including potential data loss. See
- * https://www.drupal.org/developing/api/database/configuration for more
- * information on these defaults and the potential issues.
+ * https://www.drupal.org/docs/8/api/database-api/database-configuration for
+ * more information on these defaults and the potential issues.
  *
  * More details can be found in the constructor methods for each driver:
  * - \Drupal\mysql\Driver\Database\mysql\Connection::__construct()

web/sites/default/settings.php

@@ -900,6 +900,7 @@ if (file_exists($app_root . '/' . $site_path . '/settings.local.php')) {
 }
 
 $settings['file_public_path'] = 'sites/default/files';
+$settings['file_private_path'] = $app_root . '/../private-files';
 $config['image.settings']['allow_insecure_derivatives'] = TRUE;
 $settings['config_sync_directory'] = '../config/default';