NodeJS app builds with Heroku, but it shows application error

Question

I am setting up a NodeJS Heroku app. I just want an empty app up and running.

My dir includes a package.json and an app.js file.

The Heroku app builds without e

Answer 1

Looks like you're missing a Procfile

https://devcenter.heroku.com/articles/getting-started-with-nodejs#define-a-procfile

Answer 2

Maybe you need file Procfile

web: node app.js