node js take screenshot whole page size

webscreen.js

'use strict'
const express = require('express')
const bodyParser = require('body-parser')
var webshot = require('/root/node-webshot/lib/webshot')
var options = { shotSize: {  height: 'all' } , renderDelay : 500 ,  quality : 75 };
const app = express()
app.use(bodyParser.urlencoded({ extended: false }))
app.use('/images', express.static(__dirname + '/images'))
app.post('/web', function (req, res) {
	const myurl = req.body.myurl	;
	const mytitle = req.body.mytitle;
	 
	webshot( myurl, '/root/node-webshot/webscreen/images/'+mytitle+'.png' , options, function(err) {
		if( err){
			console.log(`error: ${err}`);
		}
	});
	res.set('Content-Type', 'text/plain');
	res.send(`You sent: ${myurl} to Express`);
})

app.listen(8080, function (err) {
  if (err) {
    throw err
  }
  console.log('Server started on port 8080')
})

node webscreen.js
curl --data "myurl=mohsendavari.ir&mytitle=mohsen" localhost:8080/web
localhost:8080/images/mohsen.png

first install https://github.com/brenden/node-webshot
thene install npm install express body-parser