backend/web/index.php
<?php
// Composer
require(__DIR__.'/../../vendor/autoload.php');
// Environment
require(__DIR__.'/../../common/env.php');
// Yii
require(__DIR__.'/../../vendor/yiisoft/yii2/Yii.php');
// Bootstrap application
require(__DIR__.'/../../common/config/bootstrap.php');
require(__DIR__.'/../config/bootstrap.php');
$config = \yii\helpers\ArrayHelper::merge(
require(__DIR__.'/../../common/config/base.php'),
require(__DIR__.'/../../common/config/web.php'),
require(__DIR__.'/../config/base.php'),
require(__DIR__.'/../config/web.php')
);
(new yii\web\Application($config))->run();