update README

README.md

@@ -26,3 +26,45 @@ or add
 ```
 
 to the require section of your composer.json.
+
+Configuration
+-------------
+You need to configure two actions as follows:
+
+```php
+<?php
+
+namespace app\controllers;
+
+use Yii;
+use yii\helpers\Url;
+use yii\web\Controller;
+
+/**
+ * Class SiteController
+ *
+ * @package app\controllers
+ */
+class SiteController extends Controller
+{
+    /**
+     * @inheritdoc
+     */
+    public function actions(): array
+    {
+        return [
+            'docs' => [
+                'class' => 'yii2mod\swagger\SwaggerAction',
+                'restUrl' => Url::to(['site/json-schema']),
+            ],
+            'json-schema' => [
+                'class' => 'yii2mod\swagger\SwaggerApiAction',
+                // Тhe list of directories that contains the swagger annotations.
+                'scanDir' => [
+                    Yii::getAlias('@app/modules/api'),
+                ],
+            ],
+        ];
+    }
+}
+```