koseven/system/config/url.php

<?php

return [

	'trusted_hosts' => [
		// Set up your hostnames here
		//
		// Example:
		//
		//        'example\.org',
		//        '.*\.example\.org',
		//
		// Do not forget to escape your dots (.) as these are regex patterns.
		// These patterns should always fully match,
		// as they are prepended with `^` and appended with `$`
	],

];