Yii2 - Config to auto send email notification SQL error

You want to receive email when your website has SQL error. You use Yii2 Framework to build your website. You don't know how to config it?

# Setup mailer
$config['components']['mailer'] = [
        'class' => 'yii\swiftmailer\Mailer',
        'useFileTransport' => false,
        'transport' => [
            'class' => 'Swift_SmtpTransport',
            'host' => 'smtp.huypv.net',
            'username' => 'no-reply@huypv.net',
            'password' => 'only_me',
            'port' => '587',
            'encryption' => '',
        ],
    ];

# Config log
$config['components']['log'] = [
        'traceLevel' => YII_DEBUG ? 3 : 0,
        'targets' => [
            [
                'class' => 'yii\log\EmailTarget',
                'levels' => ['error'],
                'categories' => ['yii\db\*'],
                'message' => [
                   'from' => ['no-reply@huypv.net'],# must be same username in mailer setup above
                   'to' => ['coder@huypv.net'],
                   'subject' => 'Database errors at huypv.net',
                ],
            ],
        ],
    ];