**Note:** Not to be tackled until at least July 1st 2021
During work on {T283174}, @ItamarWMDE created a fork of the hadolint GitHub action in order to enable linting for multiple of Docker files in a repository (to ensure all Dockerfiles in the release pipeline are indeed linted). However, relying on a 3rd party fork is not ideal, and it was decided to give the upstream PR a month to be merged.
Therefore, the `lint_dockerfiles` job in the `lint.yml` workflow ([link](https://github.com/wmde/wikibase-release-pipeline/blob/302dc9f880827483a0e4942d0eb2b739fadf7af1/.github/workflows/lint.yml#L7-L14)) must be updated according to the current state of the official hadolint GitHub Action.
* If the PR was merged and a new version was released, then the dependency must be updated accordingly
* Otherwise, we need to decide whether WMDE want to maintain a fork of the hadolint action, or forgo the functionality offered by the fork for some other solution.
**ACs**
[ ] `lint_dockerfiles` job in the `lint.yml` workflow no longer relies on Itamar's personal fork
**Hints:**
- One suggested course of action, if we don't want to maintain our own fork and the PR wasn't merged, is to split the `lint_dockerfiles` job into multiple steps that lint each subdirectory individually