Buildpacks predate Docker. They're standardized build scripts for popular app runtimes. Heroku created the concept and applied it for their PaaS years before

Buildpacks predate Docker. They're standardized build scripts for popular app runtimes. Heroku created the concept and applied it for their PaaS years before Docker was a thing. They're not a competitor to Docker containers. They are perhaps a competitor to Dockerfiles.