NodeJS, how to render static HTML with Express 4?

I need to render HTML files in express 4, I write something like this but not works good.

  app.route('/form1').get(function(req,res){
        res.sendfile('./public/danial/forms/form1.html');
  });

This code can send the HTML file ,but it exactly send the HTML file and don't send css or js files that HTML file need them ,this is the logs :

   GET /form1 304 2.743 ms - -
   GET /css/bootstrap.css 404 2.284 ms - -
   GET /css/bootstrap-theme.css 404 2.193 ms - -
   GET /css/bootstrap-switch.css 404 2.226 ms - -
   // and many others

I need to do something like this:

   app.get('/', function(req, res) {
      res.render('index.html');
   });

how can I fix it?

(many other questions are for express 3 and I can't find answer)

app.get('/', function(req, res) {
    res.render('./public/danial/forms/form1.html');
});

[EDIT]

To render static html files use the static middleware:

app.use(express.static(path.join(__dirname, 'public')));

What this does is tell express to look for static files in the public directory of the application.

Finally I myself find my answer.I use ejs template and change my extension of HTML files to ejs and render them and for needed files I use public folder.

Render HTML in Express 4 without a View Engine

take the following directory structure for example..

-> root
   -> node_modules
      -> express
      -> html
   -> public
      -> pages
         -> index.html
   -> app.js

app.js

var express = require('express');
var app     = express();
var path    = require("path");

// set static directories
app.use(express.static(path.join(__dirname, 'public')));

app.get('/', function (req, res) {
    res.sendFile(path.join(__dirname+ '/public/pages/index.html'));
});

var port = process.env.PORT || 5000;
app.listen(port);
console.log('Listening on port ',  port);

Note: If you get this error.. Cannot find module 'html' Its because you are missing the HTML node module. Run npm install html command from your project root to fix this issue.