Only accept a certain url (Grafana Dashboard)

[Maximus48p]

I have Grafana running behind NPM with SSL and further without any special settings and works perfectly.

And now i only want to accept urls which contains 'kiosk' or 'login' in de url.

I need to add some rules at 'Custom Nginx Configuration' within advanced tab, i only don't know how.

Any help is very much appreciated. Thank you.