Warning: mysqli::__construct(): php_network_getaddresses: getaddrinfo for db failed: Temporary failure in name resolution in /var/www/html/core/database.php on line 18

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for db failed: Temporary failure in name resolution in /var/www/html/core/database.php:18 Stack trace: #0 /var/www/html/core/database.php(18): mysqli->__construct('db', 'michal', Object(SensitiveParameterValue), 'better-stack') #1 /var/www/html/core/app.php(38): Database->connect(Array) #2 /var/www/html/core/app.php(66): App->__construct() #3 /var/www/html/index.php(4): require('/var/www/html/c...') #4 {main} thrown in /var/www/html/core/database.php on line 18