Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo for mysql failed: Name or service not known in /var/www/html/dbh.php on line 3

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for mysql failed: Name or service not known in /var/www/html/dbh.php:3 Stack trace: #0 /var/www/html/dbh.php(3): mysqli_connect('mysql', 'root', 'tYl8jQb1JPCftrN', 'prod-serviskota...') #1 /var/www/html/public/index.php(3): include('/var/www/html/d...') #2 {main} thrown in /var/www/html/dbh.php on line 3