Smarter Dockerfile linter to validate best practices

Current version

hadolint requires the following formulae to be installed:
cabal-install Command-line interface for Cabal and Hackage
ghc@8.2 8.2.2 Glorious Glasgow Haskell Compilation System

Recent formula history

ilovezfs hadolint 1.6.0
ilovezfs hadolint: depend on ghc@8.2 at build time (#25522)
ilovezfs hadolint 1.5.1
ilovezfs hadolint 1.5.0
ilovezfs hadolint 1.4.0

Formula code at GitHub