I am building an Express app and having some issues with routing. My '/' route is working perfectly, however other routes are not. I've looked into other questions people have posted and these have not resolved my issues. 

I have a routes/index.js file:

```
module.exports = function(app){
  app.use('/', require('./routes/home'));
  app.use('/about', require('./routes/about'));
}

```

My routes/home.js: - WORKING!

```
const express = require('express');
const router = express.Router();

router.get('/', function(req, res) {
   res.render('app/home');
});

module.exports = router;

```

My routes/about.js: - NOT WORKING!

```
const express = require('express');
const router = express.Router();

router.get('/about', function(req, res) {
   res.render('app/about');
});

module.exports = router;

```

When I go to '/about' I see this error in the browser - 'Cannot GET /about'

Both the home.html and about.html files are located in the same views directory. 

Any help here would be very appreciated!