static nginx site

example.conf

# Add this one along with your other nginx config files
# Do not change any existing site config file

# This example use port 8080
# Maybe you have to change to another port

# See also: https://www.nginx.com/resources/admin-guide/serving-static-content/

server {
    listen       8080;
    root         /var/www/html/images_c/

    location / {
    }
}

Where to put this file?
See: https://www.digitalocean.com/community/tutorials/how-to-set-up-nginx-server-blocks-virtual-hosts-on-ubuntu-16-04
In that tutorial this example.conf is called Server Block File