[ 'db' => [ 'class' => 'yii\db\Connection', 'dsn' => 'mysql:host=mariadb1;dbname='.$_SERVER['fitness_db_host'], 'username' => $_SERVER['fitness_db_username'], 'password' => $_SERVER['fitness_db_password'], 'charset' => 'utf8', ], 'mailer' => [ 'class' => 'yii\swiftmailer\Mailer', 'viewPath' => '@common/mail', 'useFileTransport' =>false, 'transport' => [ 'class' => 'Swift_SmtpTransport', 'host' => '172.17.0.4', 'port' => '1025', ], ], ], ];