redirect localhost instead of myserver.org:3000/login/callback

being redirected all the time to my localhost-server, instead of

myserver.org:3000/login/callback

to

localhost:3000/login/callback

do not understand why and where from

here part of my code:

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

app.get('/account', ensureAuthenticated, function(req, res){
  res.render('account', { user: req.user });
});


app.get('/login',
  passport.authenticate('saml', { failureRedirect: '/', failureFlash: true }),
  function(req, res) {
        console.log('so far worked out - =) 2');
    res.redirect('/');
  }
);

        console.log('so far worked out - =) 1');
app.post('/login/callback',
  passport.authenticate('saml', { failureRedirect: '/', failureFlash: true }),
  function(req, res) {
        console.log('so far worked out - =) 3');
//    res.redirect('');
        res.render('index', { user: req.user });
  }
);

app.get('/Metadata', // <--- also doesn't work 
        function(req,res){
console.log(SAML.prototype.validatePostResponse);
        console.log('so far worked out - =) 4');
        req.type('application/xml');
        res.send(200, samlStrategy.generateServiceProviderMetadata(cert));
    }
);

do not get the metadata... it doesn't print any of the console.log('so fa...') besides with the console.log('so fa... 1')

hope somebody sees the problem thank you in advance ... ;)

(similar topic here: redirect to localhost - stackoverflow )