add option to enable daily backups

Signed-off-by: szaimen <szaimen@e.mail.de>

php/src/Cron/UpdateMastercontainer.php

@@ -0,0 +1,17 @@
+<?php
+declare(strict_types=1);
+
+// increase memory limit to 2GB
+ini_set('memory_limit', '2048M');
+
+use DI\Container;
+
+require __DIR__ . '/../../vendor/autoload.php';
+
+$container = \AIO\DependencyInjection::GetContainer();
+
+/** @var \AIO\Controller\DockerController $dockerController */
+$dockerController = $container->get(\AIO\Controller\DockerController::class);
+
+# Update the mastercontainer
+$dockerController->startWatchtower();