Yeah I think that's a relic of their very early Node.js beta. Now they look for package.json (https://github.com/heroku/heroku-buildpack-nodejs/blob/master/bin/

Yeah I think that's a relic of their very early Node.js beta. Now they look for package.json (https://github.com/heroku/heroku-buildpack-nodejs/blob/master/bin/detect#L4 https://github.com/heroku/heroku-buildpack-nodejs/blob/maste...) and you define the command to start the app in the Procfile.