Dockerfile linter. More information: <https://github.com/hadolint/hadolint>.

• Lint a Dockerfile:
  hadolint path/to/Dockerfile
• Lint a Dockerfile, displaying the output in JSON format:
  hadolint --format json path/to/Dockerfile
• Lint a Dockerfile, displaying the output in a specific format:
  hadolint --format tty|json|checkstyle|codeclimate|codacy path/to/Dockerfile
• Lint a Dockerfile ignoring specific rules:
  hadolint --ignore DL3006 --ignore DL3008 path/to/Dockerfile
• Lint multiple Dockerfiles using specific trusted registries:
  hadolint --trusted-registry docker.io --trusted-registry example.com:5000 path/to/Dockerfile path/to/another/Dockerfile

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