This repository holds recipes for building the base images for Heroku stacks. The recipes are also rendered into Docker images that are available on Docker Hub:
| Image | Base | Type | Status |
|---|---|---|---|
| heroku/heroku:18 | ubuntu:18.04 | Heroku Run Image | End-of-life |
| heroku/heroku:18-build | heroku/heroku:18 | Heroku Build Image | End-of-life |
| heroku/heroku:18-cnb | heroku/heroku:18 | CNB Run Image | End-of-life |
| heroku/heroku:18-cnb-build | heroku/heroku:18-build | CNB Build Image | End-of-life |
| heroku/heroku:20 | ubuntu:20.04 | Heroku Run Image | Available |
| heroku/heroku:20-build | heroku/heroku:20 | Heroku Build Image | Available |
| heroku/heroku:20-cnb | heroku/heroku:20 | CNB Run Image | Available |
| heroku/heroku:20-cnb-build | heroku/heroku:20-build | CNB Build Image | Available |
| heroku/heroku:22 | ubuntu:22.04 | Heroku Run Image | Recommended |
| heroku/heroku:22-build | heroku/heroku:22 | Heroku Build Image | Recommended |
| heroku/heroku:22-cnb | heroku/heroku:22 | CNB Run Image | Recommended |
| heroku/heroku:22-cnb-build | heroku/heroku:22-build | CNB Build Image | Recommended |
See BUILD.md for instructions on how to build the images yourself.