Add hadolint action

[AlexAxthelm]

hadolint is a linter for Dockerfile
https://github.com/hadolint/hadolint

[github-actions]

Docker image from this PR (33af2fe) created

docker pull ghcr.io/rmi-pacta/workflow.pacta:pr13

[cjyetman]

cool! I do wonder what is the alternative for "Do not use --platform flag with FROM"?

[AlexAxthelm]

cool! I do wonder what is the alternative for "Do not use --platform flag with FROM"?

The suggested mechanism to build for alternate platforms is to specify --platform in the build command, rather than the Dockerfile. With buildkit, you can actually target multiple platforms in a single build:

docker buildx build --platform linux/amd64,linux/arm64 .

[cjyetman]

cool! I do wonder what is the alternative for "Do not use --platform flag with FROM"?

The suggested mechanism to build for alternate platforms is to specify --platform in the build command, rather than the Dockerfile. With buildkit, you can actually target multiple platforms in a single build:

docker buildx build --platform linux/amd64,linux/arm64 .

hmmmmm.... ok, I think I was trying to facilitate using a Docker compose file in which one could set their desired platform, but we're not really using that here anymore