mobile api changes + docker image basics

environments/cutlergyor/apache2/config/backend/main-local.php

@@ -0,0 +1,16 @@
+<?php
+return [
+    'components' => [
+        'request' => [
+            // !!! insert a secret key in the following (if it is empty) - this is required by cookie validation
+            'cookieValidationKey' => 'cutler_EUDhEYy-Bl-cq02-OZj6Cqm1wtw9jj3U',
+        ],
+        'session' => [
+            'name' => '_cutlerBackendSessionId', // unique for backend
+            'savePath' => __DIR__ . '/../runtime', // a temporary folder on backend
+            'cookieParams' => [
+                // 'path' => '/backend/web',
+            ],
+        ],
+    ],
+];