There’re a few ways to add NodeJS process to windows server.
Install node-windows
npm install -g node-windows
Then Daemonizing your script is accomplished through code:

var Service = require('node-windows').Service;

// Create a new service object
var svc = new Service({
  name:'Hello World',
  description: 'The NodeJS web server.',
  script: 'C:\\path\\to\\my\\node\\script.js'
});

// Listen for the "install" event, which indicates the
// process is available as a service.
svc.on('install',function(){
  svc.start();
});

// Listen for the "start" event and let us know when the
// process has actually started working.
svc.on('start',function(){
  console.log(svc.name+' started!\nVisit http://localhost:3001 to see it in action.');
});

// Install the script as a service.
svc.install();

Or simply use the daemon npm module

var daemon = require('daemon');

daemon.daemonize({
    stdout: './log.log'
  , stderr: './log.error.log'
  }
, './node.pid'
, function (err, pid) {
  if (err) {
    console.log('Error starting daemon: \n', err);
    return process.exit(-1);
  }
  console.log('Daemonized successfully with pid: ' + pid);

  // Your Application Code goes here
});

Or put nodejs MyServer.js in a .sh file, and nohup sh startserver.sh

Or use this package built by talles

npm install -g qckwinsvc

Installing your service:

> qckwinsvc
prompt: Service name: [name for your service]
prompt: Service description: [description for it]
prompt: Node script path: [path of your node script]
Service installed

Uninstalling your service:

> qckwinsvc --uninstall
prompt: Service name: [name of your service]
prompt: Node script path: [path of your node script]
Service stopped
Service uninstalled

Or install os-service here

npm install os-service

var service = require ("os-service");

//A program can then be added, removed and run as a service:

service.add ("my-service");
service.remove ("my-service");
var logStream = fs.createWriteStream ("my-service.log");

service.run (logStream, function () {
    console.log ("stop request received");
    service.stop ();
});