Error while deploying Ionic App on Heroku


I’ve tried to deploy an CMS ionic app on heroku. Heroku reports that the installation was successful, but I when the app is trying to start it crashed and I get the following error:

2017-07-02T18:38:28.941499+00:00 app[web.1]: throw err;
2017-07-02T18:38:28.941489+00:00 app[web.1]: module.js:471
2017-07-02T18:38:28.941502+00:00 app[web.1]: Error: Cannot find module ’/app/cloud/main.js’

Any idea why is not working?