mobile api changes + docker image basics

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

@@ -0,0 +1,13 @@
+<?php
+return [
+    'components' => [
+        'request' => [
+            // !!! insert a secret key in the following (if it is empty) - this is required by cookie validation
+            'cookieValidationKey' => 'cutler_UTVb6_cw5UgJ4jukRO3ftYIxGBUfTJJw',
+        ],
+        'session' => [
+            'name' => '_cutlerFrontendSessionId', // unique for frontend
+            'savePath' => __DIR__ . '/../runtime', // a temporary folder on frontend
+        ],
+    ],
+];