heroku for node: ! Heroku push rejected, no Cedar-supported app detected

Question

I am new to heroku and express.js. I try to go through the tutorial, but I cannot make it with the step 'git push heroku master'. I followed the tutorial exactly. Below is the error message:

Counting objects: 269, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (241/241), done.
Writing objects: 100% (269/269), 188.93 KiB, done.
Total 269 (delta 9), reused 0 (delta 0)
 !     Heroku push rejected, no Cedar-supported app detected

To [email protected]:cryptic-journey-9914.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to '[email protected]:cryptic-journey-9914.git'

Answer 1

did you read the Getting Started with Node.js on Heroku article on Heroku Dev Center?

You need to declare your process type with Procfile. To do so, create a file named Procfile, with the following content:

web: node web.js

assume that your javascript file is called web.js.

p.s. don't forget to add the Procfile to git and commit it.

Answer 2

You need a package.json file (and a Procfile), it is likely not the case.

Answer 3

I have encountered this issue a few time before and it was because I was trying to push a remote branch to heroku.

To solve the problem, instead of using:

git push heroku master

I used:

git push heroku my-branch:master

This pushes the remote branch my-branch in the git repository to the master branch of heroku.