Никита Гусаков

location /nodejs {
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header Host $http_host;
      proxy_set_header X-NginX-Proxy true;

      proxy_pass http://localhost:N;
      proxy_redirect off;
}

var iconv = new Iconv('windows-1251', 'UTF-8');
http.get(url, function (res) {
  res.on('data', function (buffer) {
    var html = iconv.convert(buffer).toString();
  });
});