Make sure you have a working Docker installation (eg. docker ps) and that you’re logged in to Heroku (heroku login) and Log in to Container Registry:
heroku container:login
Navigate to the app’s directory and create a Heroku app:
heroku create
Build the image and push to Container Registry:
heroku container:push web
Then release the image to your app:
heroku container:release web
Now open the app in your browser:
heroku open