Fixed: regression error in docker "check for updates"

plugins/dynamix.docker.manager/include/DockerUpdate.php

@@ -0,0 +1,21 @@
+<?PHP
+/* Copyright 2005-2018, Lime Technology
+ * Copyright 2014-2018, Guilherme Jardim, Eric Schultz, Jon Panozzo.
+ * Copyright 2012-2018, Bergware International.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ */
+?>
+<?
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+require_once "$docroot/plugins/dynamix.docker.manager/include/DockerClient.php";
+
+$DockerTemplates = new DockerTemplates();
+$DockerTemplates->downloadTemplates();
+$DockerTemplates->getAllInfo(true);
+?>