Got a Docker image you want to deploy as-is on Heroku? Heroku’s documentation doesn’t mention it is possible, while Stack Overflow provides an -old- partial answer. But deploying a Docker image published on the Docker registry directly to Heroku is possible. You’ll still need to get some work done on your machine, using the Heroku and Docker CLIs.

Pulling the image

The first step is to pull the image from the Docker registry (let’s call it my/image) and find its ID ( image_id ):

docker pull my/image
docker images | grep my/image | awk '{print $3}'

Pushing to Heroku

Providing you’re already logged into Heroku (via…