Prevent Information Disclosure – nginx on VPS

I need to fix “Prevent Information Disclosure” according to Defender plugin but I cannot find the correct file to make the edit to. /etc/nginx/… or /usr/local/nginx/conf/.

I am using a Digital Ocean Ubuntu server setup via Server Pilot. The server is running nginx.

I am happy to give access to the server to try and find the file.

Can you help?