/etc/nginx/
    nginx.conf
    conf.d/
    sites-enabled/
        default -> /etc/nginx/sites-available/default
    sites-available/
        default (just a text file) 
            ##
            # You should look at the following URL's in order to grasp a solid understanding
            # of Nginx configuration files in order to fully unleash the power of Nginx.
            # https://www.nginx.com/resources/wiki/start/
            # https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/
            # https://wiki.debian.org/Nginx/DirectoryStructure
            #
            # In most cases, administrators will remove this file from sites-enabled/ and
            # leave it as reference inside of sites-available where it will continue to be
            # updated by the nginx packaging team.
            #
            # This file will automatically load configuration files provided by other
            # applications, such as Drupal or Wordpress. These applications will be made
            # available underneath a path with that package name, such as /drupal8.
            #
            # Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
            ##
            server {
                listen 80 default_server;
                listen [::]:80 default_server;

                root /var/www/html;

                # Add index.php to the list if you are using PHP
                index index.html index.htm index.nginx-debian.html;

                server_name _;

                location / {
                    # First attempt to serve request as file, then
                    # as directory, then fall back to displaying a 404.
                    try_files $uri $uri/ =404;
                }
            }

/var/www/html/
    index.html
    index.nginx-debian.html