http {

    #server for regular 80 port
    server {
        listen 80;
        #rest of your existing config
    }

    #add clean server for test purpose
    server {
        listen 8080;
        root EmptyHtml;

        location ~/(robots.txt|readme.html) {
                    access_log  logs/nginx-access-robots.log;
                    deny all;
            }
    }
}