Start nodejs app on server boot

I have one simple nodejs application which I want to start automatic when my VPS finish boot.
My server run Ubuntu's latest distribution which have a very decent version of upstart. Writing your own upstart scripts is very easy task, just copy and modify code bellow in

description "Your program"

start on runlevel [2345]
stop on runlevel [!2345]

respawn

exec /path/to/yourprogram.exe

description "NodeJs Server"
author "yuks"
start on started mountall
stop on shutdown
respawn
respawn limit 99 5

script
    export HOME="/root"
    exec nodejs /projects/nodejs/public/app.js >> /var/log/node.log 2>&1
end script

Main part of this .conf file is at

exec nodejs /projects/nodejs/public/app.js >> /var/log/node.log 2>&1

just modify the

const express = require('express');
const app = express();

app.get('/', function(req, res) {
    res.send('Hello World!');
});

app.listen(3000, function() {
    console.log('Server is running on port 3000');
});

with your nodejs app.
Re/Start of this daemon is ridiculusly easy:

start yourprogram 
    stop yourprogram 
    restart yourprogram

and of course this will start automaticly on boot time. Also we can view the status of daemon with this simple command:

user@nodejs:~# initctl status node-app
node-app start/running, process 339

More information about NodeJs can be found at http://nodejs.org/#about

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