Access Volumio UI with remote access


When I configure remote access with duckdns I cannot access Volumio UI in an Iframe because it is not HTTPS. I read some blogs that you can do this with the NGINX add-on. I got it working. So duckdns domain with NGINX. Now is it even possible to redirect an internal ip to the outside? I found this url with a tutorial, but it doesn’t seem to work.