Heroku deploy fails

[ugiordan]

Describe the bug
The app does not deploy on Heroku and fails with the following error:

Some possible problems:
   
   - Dangerous semver range (>) in engines.node
     https://devcenter.heroku.com/articles/nodejs-support#specifying-a-node-js-version

To Reproduce
Just follow the step-by-step Try it now with Heroku guide.

Desktop (please complete the following information):

• OS: iOS
• Browser: safari

[ugiordan]

I solved the previous issue by installing the heroku/nodejs buildpack as specified by this Heroku guide.

However, I'm still having problem in deploying this git repot to Heroku.
I had to add the environment.prod.ts file, but despite this there's still an npm ERR! missing script: serve error.

[qbsho]

@ugiordan did it finally work for you?