hadolint

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}}