diff --git a/plugins/dynamix.docker.manager/include/DoesExist.php b/plugins/dynamix.docker.manager/include/DoesExist.php
new file mode 100644
index 000000000..2783ab483
--- /dev/null
+++ b/plugins/dynamix.docker.manager/include/DoesExist.php
@@ -0,0 +1,15 @@
+<?PHP
+/* Copyright 2005-2020, Lime Technology
+ * Copyright 2012-2020, 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.
+ */
+?>
+<?
+echo file_exists($_POST['name']) ? 0 : 1;
+?>