App not compatible with buildpack

System Information
  • Strapi Version: 3.6.5
  • Operating System: Windows 10
  • Database: sqlite3
  • Node Version: 12.19.0
  • NPM Version: 6.14.8

App not compatible with buildpack

Hello, I’m new here and also new to strapi.

I’m trying to deploy my first strapi project originally developed on localhost, to heroku.

But upon following the documentation at Heroku Deployment - Strapi Developer Documentation, I keep getting this error:

App not compatible with buildpack: remote: 
Could not find 'static.json'! Please ensure it exists and is checked into Git.

I don’t know if I should create the static.json file, and if I should, what data am I to put in it?