https://buildpacks.io/
https://github.com/buildpacks/pack
https://github.com/pivotal/kpack
https://github.com/pivotal/kpack/blob/master/docs/tutorial.md

https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#writing-the-dockerfile
https://docs.spring.io/spring-boot/docs/current/gradle-plugin/reference/html/#build-image

https://docs.spring.io/spring-boot/docs/2.7.0-SNAPSHOT/gradle-plugin/reference/htmlsingle/#build-image.examples.docker.podman

buildpack sample

$ curl https://start.spring.io/starter.zip -d bootVersion=2.3.0.M1 -d dependencies=web -o demo.zip
gradle bootBuildImage