You can create an app in Heroku with Crystal's buildpack by running the following command:
$ heroku create myapp --buildpack https://github.com/scaint/heroku-buildpack-crystal.git
You can use Heroku config vars to specify versions of Crystal compiller (
CRYSTAL_VERSION) and Shards (
In order for the buildpack to work properly you should have a
file, as it is how it will detect that your app is a Crystal app.
To learn more about using custom buildpacks in Heroku, read their docs.
Copy the snippet above into CLI.