Nginx Http Transparent Proxy

(none):~# cat /etc/nginx/sites-enabled/proxy
       server {
                resolver        8.8.8.8;
                access_log      off;
                listen  [::]:8080;
                location / {
                        proxy_pass      $scheme://$host$request_uri;
                        proxy_set_header Host $http_host;
                        proxy_buffers   256 4k;
                        proxy_max_temp_file_size        0k;
                        }
                }

iptables -t nat -A PREROUTING -s 10.8.0.0/24 -p tcp --dport 80 -j DNAT --to 192.168.0.253:8080