title: Express route not working
body: <p>I am using express as server and in the last few days i tried to make a new routes under the "localhost:3000/app/home" path. The problem is that i receive a 404 error from the server when i open this path. i am sure that the file exist, so i think that the problem is the route configuration of express.</p>
  
  <p><strong>App.js</strong></p>
  
  <pre><code>var express = require('express');
  var path = require('path');
  var favicon = require('serve-favicon');
  var logger = require('morgan');
  var cookieParser = require('cookie-parser');
  var bodyParser = require('body-parser');
  var session = require('express-session');
  
  var index = require('./routes/index');
  var app_index = require('./routes/app');
  
  var app = express();
  
  // view engine setup
  app.set('views', path.join(__dirname, 'views'));
    app.set('view engine', 'jade');
  
  // uncomment after placing your favicon in /public
  //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
  app.use(logger('dev'));
  app.use(bodyParser.json());
  app.use(bodyParser.urlencoded({ extended: true }));
  app.use(cookieParser());
  
  app.use(session({ secret: 'ashasjasdiw', resave: true, saveUninitialized: false }));
  app.use(express.static(path.join(__dirname, 'public')));
  
  app.use('/', index);
  app.use('/app', app_index);
  
  
  // catch 404 and forward to error handler
  app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
  });
  
  // error handler
  app.use(function(err, req, res, next) {
    // set locals, only providing error in development
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'development' ? err : {};
  
    // render the error page
    res.status(err.status || 500);
    res.render('error');
  });
  app.listen(3000);
  module.exports = app;
  </code></pre>
  
  <p>this is my route <strong>App.js</strong></p>
  
  <pre><code>var express = require('express');
  var router = express.Router();
  
  router.get('/app', function(req, res){
    res.render('app/home');
  });
  module.exports = router;
  </code></pre>
  
  <p>I use a redirect to go under the path "/app/home" and i don't know if it's the best way to do that.
  this is the error page:
  <a href="https://i.stack.imgur.com/t58e6.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/t58e6.png" alt="enter image description here"></a></p>