Warning: mysqli::__construct(): php_network_getaddresses: getaddrinfo for mariadbcontainer failed: Name or service not known in /var/www/includes/config.php on line 11

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for mariadbcontainer failed: Name or service not known in /var/www/includes/config.php:11 Stack trace: #0 /var/www/includes/config.php(11): mysqli->__construct() #1 /var/www/html/index.php(3): require('...') #2 {main} thrown in /var/www/includes/config.php on line 11