heroku apps:stacks

heroku apps:stacks -a your-app
=== ⬢ your-app Available Stacks
* container
  heroku-18
  heroku-20

See also

• heroku apps: [heroku create | heroku destroy | heroku unlock | heroku transfer | heroku open |heroku rename | heroku stacks | heroku join | heroku leave | heroku favorites | heroku lock | heroku errors | heroku apps --help ]