Moritz Heiber a0813806d6
Add hadolint as Dockerfile linter (#20993)
* Added hadolint as Dockerfile linter in pipeline and resolved remaining hadolint issues in Dockerfile

* Use more specific version of hadolint Action

* Bumpt hadolint Action version to latest version to avoid deprecation notice

* Being _really_ specific now
2022-12-15 15:57:17 +01:00
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