where is the log file

[sebastianet]

I see the sentence
var logger = require('morgan');

But .. where is the log file I can see ?

[sebastianet]

is this all, on screen ?

`sag@odin:~/Raspberry-Pi-Simple-Web-GPIO-GUI $ sudo npm start

Raspberry-Pi-Simple-Web-GPIO-GUI@1.0.0 start /home/sag/Raspberry-Pi-Simple-Web-GPIO-GUI
node ./bin/www

GET / 200 2930.824 ms - 12778
`