How to mirror proxy requests with nginx

proxy

server {
        listen ip;

        server_name proxyhost;

 	location / {
      		proxy_pass http://some.source/folder/;
      		proxy_set_header X-Real-IP $remote_addr;
      		proxy_set_header Host $host;
      		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    	}
}