Redirecting 301 using express and node.js. GET not being called

I'm trying to do a simple a 301 redirection. My code for that looks something like this:

app.get('/',function(req,res){
  console.log(req.get('host')+req.originalUrl);
  if(req.get('host')+req.originalUrl == "facebook.com:3000/"){
    res.redirect(301,'https://youtube.com');
  } else {
    res.redirect(301,'https://google.com');
  }
});

So I what did was edited my host file so that facebook.com was linked to localhost (127.0.0.1) Problem is my app.get() isn't being called except for a couple of times( usually when I don't look at app.js file for a while then use it again). After those times, it will always redirect to the same website even if I edit the file for it redirect to other websites. Here is some relevant code in addition to this:

app.locals.cacheBuster = Date.now();
app.set('port', process.env.PORT || argv.p || 3000);
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.use(express.compress());
app.use(express.favicon(path.join(__dirname, 'public/img/favicon.ico')));
app.use(express.logger('dev'));
app.use(express.cookieParser());
app.use(express.json());
app.use(express.urlencoded());
app.use(expressValidator());
app.use(express.methodOverride());
app.use(express.session({
  secret: 'your secret code',
  store: new MongoStore({
    db: mongoose.connection.db,
    auto_reconnect: true
  })
}));
app.use(passport.initialize());
app.use(passport.session());
app.use(function(req, res, next) {
  res.locals({
    user: req.user,
    cookies: req.cookies,
    pullup: { // global client-side JS object
      baseUrl: req.protocol + '://' + req.get('host')
    }
  });

  if (!_.isObject(req.session.flash) || !Object.keys(req.session.flash).length) {
    req.session.windowscrolly = 0;
  }
  if (req.body.windowscrolly) req.session.windowscrolly = req.body.windowscrolly;
  res.locals.windowscrolly = req.session.windowscrolly;
  res.setHeader("Content-Security-Policy", "script-src 'self' https://apis.google.com http://sysinct.herokuapp.com; frame-src 'self' https://gitter.im;");
  res.setHeader("X-Frame-Options", "DENY");
  next();
});

app.use(flash());

app.use(less({ src: __dirname + '/public', compress: true }));

app.use(app.router);

app.use(express.static(path.join(__dirname, 'public'), { maxAge: week }));

app.use(function(req, res) {
  res.render('404', { status: 404 });
});

app.use(function(err, req, res, next){
  console.error("req: "+req +"\nerror:"+err.stack);
  res.statusCode = 500;
  res.render('error',{error:err});
});

app.locals.timeago = timeago;

...eventually,

app.listen(app.get('port'), function() {
  console.log("✔ Express server listening on port %d in %s mode", app.get('port'), app.settings.env);
});

I've tried inserting my app.get function into various places around this chunk of code (I'm aware I don't put app.get() in this example right now because I don't know where to put it) because I read that the order that it has with app.use(app.router) and other middleware matters, but I've had no luck finding out why the app.get() isn't called.

1. I'd like to know why app.get() isn't being called
2. If my way of redirecting is right. Thanks!