add rest application and discount-status rest method

environments/dev/rest/config/main-local.php

@@ -0,0 +1,21 @@
+<?php
+
+$config = [
+    'components' => [
+        'request' => [
+            // !!! insert a secret key in the following (if it is empty) - this is required by cookie validation
+            'cookieValidationKey' => '',
+        ],
+    ],
+];
+
+if (!YII_ENV_TEST) {
+    // configuration adjustments for 'dev' environment
+    $config['bootstrap'][] = 'debug';
+    $config['modules']['debug'] = 'yii\debug\Module';
+
+    $config['bootstrap'][] = 'gii';
+    $config['modules']['gii'] = 'yii\gii\Module';
+}
+
+return $config;

environments/dev/rest/config/params-local.php

@@ -0,0 +1,3 @@
+<?php
+return [
+];

environments/dev/rest/web/index-test.php

@@ -0,0 +1,18 @@
+<?php
+
+// NOTE: Make sure this file is not accessible when deployed to production
+if (!in_array(@$_SERVER['REMOTE_ADDR'], ['127.0.0.1', '::1'])) {
+    die('You are not allowed to access this file.');
+}
+
+defined('YII_DEBUG') or define('YII_DEBUG', true);
+defined('YII_ENV') or define('YII_ENV', 'test');
+
+require(__DIR__ . '/../../vendor/autoload.php');
+require(__DIR__ . '/../../vendor/yiisoft/yii2/Yii.php');
+require(__DIR__ . '/../../common/config/bootstrap.php');
+require(__DIR__ . '/../config/bootstrap.php');
+
+$config = require(__DIR__ . '/../../tests/codeception/config/frontend/acceptance.php');
+
+(new yii\web\Application($config))->run();

environments/dev/rest/web/index.php

@@ -0,0 +1,18 @@
+<?php
+defined('YII_DEBUG') or define('YII_DEBUG', true);
+defined('YII_ENV') or define('YII_ENV', 'dev');
+
+require(__DIR__ . '/../../vendor/autoload.php');
+require(__DIR__ . '/../../vendor/yiisoft/yii2/Yii.php');
+require(__DIR__ . '/../../common/config/bootstrap.php');
+require(__DIR__ . '/../config/bootstrap.php');
+
+$config = yii\helpers\ArrayHelper::merge(
+    require(__DIR__ . '/../../common/config/main.php'),
+    require(__DIR__ . '/../../common/config/main-local.php'),
+    require(__DIR__ . '/../config/main.php'),
+    require(__DIR__ . '/../config/main-local.php')
+);
+
+$application = new yii\web\Application($config);
+$application->run();