This is a simple Node.js + Express application written in Typescript that can be built and run on Heroku.
To deploy this application simply create a new Heroku app
heroku create
and then just push the sources to Heroku
git push heroku master
Heroku will download all necessary libraries and fire the web process defined in Procfile that will build and start the application.
Typically you will add typescript as a devDependency to your package.json.
But this won't work on Heroku since those dependencies are not downloaded
(due to NODE_ENV being set to production).
In order to go around this issue you just simply need to add typescript as a regular dependency and build the project after each push.