Nginx Install Instructions
Make sure you have installed Nginx.
$ apt install nginx
Note: packages are saved by default in your user's home directory.
If you went to the IP address of your pi in a web browser on a device that was on the same wi-fi network as the pi you should be able to see the default Nginx site already.
Nginx automatically creates default HTML files on the installation. To find that HTML index page in your file system on the pi, change directory:
$ cd /var/www/html
The default HTML document will be named "index.nginx-debian.html" which you can see if you run the ls command now.
The default configuration file for this simple static site can be found here:
$ cd /etc/nginx/sites-enabled
Fragment form Servpub Docs [see page 2]