How can I deploy a laradock app on heroku [on hold]

I have a dockerized laravel app with laradock.
I want to deploy this app on Heroku. I have many containers:
redis nginx mysql phpmyadmin and workspace.

So i don’t know which container i should add to heroku.yml
Any suggestion would be helpful. Thanks.

NOTE: I read some tutorials but they’re not helpful for my project structure where i have many containers.

Source: StackOverflow