onbuild tags are deprecated: https://github.com/docker-library/official-images/issues/2076 https://github.com/docker-library/official-images/issues/207... … al

onbuild tags are deprecated: https://github.com/docker-library/official-images/issues/2076 https://github.com/docker-library/official-images/issues/207... … although using an onbuild image here wouldn't hurt