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Set the lookup path of view folder of ejs in express

I have app.js in Express_server folder.Full location of aap.js is I:\WEB Development\Node\Express_server\
and I made views folder at the location I:\WEB Development\Node\
How can I set the lookup path of views folder to above location(I:\WEB Development\Node)?
code of my app.js
const express = require('express');
const app = express();
app.set('view engine', 'ejs');
app.get('/',function(req, res){
res.render('index');
});

You can change your views default path:
app.set('views', path.join(__dirname, '../views'))

const express = require('express')
const app = express()
const port = 3000
require("./route/route.js")(app);
app.set('views', path.join(__dirname, '../views'))
app.set('view engine','ejs');
app.listen(port, () => console.log(`Example app listening on port ${port}!`))

In Node.js, res.render is returning a 404 error on router.get

I'm building my first Node application and having some trouble displaying the page that I want with a GET request. I have installed ejs (opinions welcome on that!) so my understanding is that I do not need to define the 'views' folder. Here is my routes file so far:
const express = require('express');
const router = express.Router();
const Event = require('../models/event')
router.get('/'), function(req, res, next){
/* Event.find({}).then(function(events){
res.send(events);
});
});*/
res.render('../../index');
};
router.post('/events', (req, res) => {
Event.create(req.body);
res.send({type: POST})
});
module.exports = router;
The database is connecting just fine, which I can see with the code that I have commented out in the get request. But for some reason I can't render my index file. My file structure is as follows:
File tree:
So I need to go up two levels, correct? I tried index, index.ejs, ../index, views/index, nothing has worked. What am I doing wrong?
EDIT: this is my server.js:
const express = require('express');
const app = express();
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
const routes = require('./routes/index');
var path = require("path");
app.set('view engine', 'ejs');
app.set('views', path.join(__dirname, 'views'));
app.use(bodyParser.json());
app.use(express.static('public'));
app.use(routes);
app.use(bodyParser.urlencoded({extended: true}))
mongoose.connect('mongodb://junk:junk#ds141242.mlab.com:41242/alaska-events');
app.listen(3000, () => {
console.log('listening on 3000')
});

views folder is placed directly in root folder, and using we app.set('views', path.join(__dirname, 'views')); point it to views folder. So in render directly mention the view name.
router.get('/', function(req, res, next){
res.render('index');
});

Thanks for your help everyone, turned out to be just a typo. router.get('/'), function(req, res, next) should have been router.get('/', function(req, res, next).

Cannot GET/ portfolio.ejs

I have main page with link in it. When I am trying to open link 'porfolio.ejs' I get page with the message "Cannot GET/portfolio.ejs"
Here is my index.js
var express = require('express');
var app = express();
app.set('port', (process.env.PORT || 5000));
app.use(express.static(__dirname + '/public'));
// views is directory for all template files
app.set('views', __dirname + '/views');
app.set('view engine', 'ejs');
app.get('/', function(request, response) {
response.render('mainpage');
});
app.get('/portfolio', function(request, response) {
response.render('portfolio');
});
app.listen(app.get('port'), function() {
console.log('Node app is running on port', app.get('port'));
});

Using Socket.io with Node.js, Express and Jade

I have some trouble to use Socket.io even just to test if a client is connected. I've tried many things and I think that my mistake is, maybe, when I do the app.get function. I have also tried to do this in an route js file but it wasn't conclusive neither. So here are my different codes :
App.js
/**
* Module dependencies.
*/
var express = require('express');
var routes = require('./routes');
var user = require('./routes/user');
var http = require('http');
var path = require('path');
var mongo = require('mongodb');
var monk = require('monk');
var db = monk('mongodb://xxxxx:xxxxx#ds051067.mongolab.com:51067/jdo');
var app = express(),
server = http.createServer(app) ,
io = require('socket.io').listen(server);
// all environments
app.set('port', process.env.PORT || 3000);
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.json());
app.use(express.urlencoded());
app.use(express.methodOverride());
app.use(express.cookieParser('This is secret'));
app.use(express.session());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
io.sockets.on('connection', function (socket) {
console.log('Un client est connecté !');
});
// app.get('/', routes.index);
app.get('/users', user.list);
app.get('/deplacement',routes.deplacement);
app.get('/monCompte', routes.compte);
app.get('/connexion', routes.connexion);
app.get('/', function(req, res) {
res.render('index.jade');
});
server.listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
Index.jade
extends layout
block content
script(src="/socket.io/socket.io.js").
var socket = io.connect('http://localhost:3000');
});
PS : Sorry if my english is bad ^^

You can't use inline javascript in the same script tag as an included script.
extends layout
block content
script(src="/socket.io/socket.io.js")
script.
var socket = io.connect('http://localhost:3000');

node.js express-validator ERR_EMPTY_RESPONSE

I just try to write a simple node.js application, but if I use the express-validator the site is just loading and do nothing :(
"waiting on localhost", after some time an "ERR_EMPTY_RESPONSE" error appears.
If i delete the app.use(expressValidator) the application works again.
var express = require('express'),
expressValidator = require("express-validator");
var app = express();
app.configure(function(){
app.set('view engine', 'jade');
app.set('views', __dirname + '/views');
app.use(express.bodyParser());
app.use(expressValidator);
});
app.get('/', function(req, res) {
console.log('get something get');
res.render('app.jade');
});
app.post('/', function(req, res){
console.log('get something post');
res.render('app.jade');
});
app.listen(process.env.PORT || 8080);

You need to call the expressValidator function to get it to return a middleware handler:
app.use(expressValidator());
^^ important!