Update to Drupal 8.0.0-beta15. For more information, see: https://www.drupal.org/node/2563023

update.php

@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * @file
+ * The PHP page that handles updating the Drupal installation.
+ *
+ * All Drupal code is released under the GNU General Public License.
+ * See COPYRIGHT.txt and LICENSE.txt files in the "core" directory.
+ */
+
+use Drupal\Core\Update\UpdateKernel;
+use Symfony\Component\HttpFoundation\Request;
+
+$autoloader = require_once 'autoload.php';
+
+$kernel = new UpdateKernel('prod', $autoloader);
+$request = Request::createFromGlobals();
+
+$response = $kernel->handle($request);
+$response->send();
+
+$kernel->terminate($request, $response);