accounts/common/config/config-prod.php

<?php
return [
    'components' => [
        'db' => [
            'enableSchemaCache' => true,
            'schemaCacheDuration' => 3600,
            'schemaCache' => 'cache',
        ],
        'mailer' => [
            'useFileTransport' => false,
            'transport' => [
                'class' => Swift_SmtpTransport::class,
                'host' => 'ely.by',
                'username' => getenv('SMTP_USER'),
                'password' => getenv('SMTP_PASS'),
                'port' => 587,
                'encryption' => 'tls',
                'streamOptions' => [
                    'ssl' => [
                        'allow_self_signed' => true,
                        'verify_peer' => false,
                    ],
                ],
            ],
        ],
    ],
];