Someone

server {
        listen   80 default;
        server_name  server1 server2;

        resolver XX.YY.ZZ.QQ;

        access_log  /var/log/nginx/proxies.access.log;
        error_log  /var/log/nginx/proxies.error.log notice;

        location / {
          proxy_pass http://$host$request_uri;
        }

}