I should start by saying I\'m totally new to Heroku, and it\'s all looking pretty to foreign to me right now.
Anyway, I\'ve done the Heroku getting started tutorial
I was working on this for the past 3 hours and now i get it clearly. all you need to do is init with whatever project and all i did it "npm init"
It seems that you have not initiated your master branch properly. Have you commited your files? Try (assuming you are on master branch):
git add .
git commit -m "First commit"
git push heroku master:master
Another, more direct approach, is to push the HEAD:
git push heroku HEAD:master