resolver 8.8.8.8;
         location ~* /proxy/([^/]+)/(.*){
                
                set $newhost $1;
                set $params $2;
                
                proxy_set_header Host $newhost;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

                proxy_pass http://$newhost/$params;
          }