Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo for db failed: Temporary failure in name resolution in /var/www/html/partner.php on line 3

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for db failed: Temporary failure in name resolution in /var/www/html/partner.php:3 Stack trace: #0 /var/www/html/partner.php(3): mysqli_connect('db', 'root', Object(SensitiveParameterValue), 'snapeats') #1 {main} thrown in /var/www/html/partner.php on line 3