Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for db failed: Temporary failure in name resolution in /var/www/html/booking-admin/dbconnect.php:13 Stack trace: #0 /var/www/html/booking-admin/dbconnect.php(13): mysqli_connect('db', 'root', Object(SensitiveParameterValue), 'blackcar') #1 /var/www/html/index.php(5): include_once('/var/www/html/b...') #2 {main} thrown in /var/www/html/booking-admin/dbconnect.php on line 13