adjust docker-lint to use hadolint #635

	name: Docker Lint

	on:
	pull_request:
	# paths:
	# - 'Containers/**'
	push:
	branches:
	- main
	paths:
	- 'Containers/**'

	permissions:
	contents: read

	concurrency:
	group: docker-lint-${{ github.head_ref \|\| github.run_id }}
	cancel-in-progress: true

	jobs:
	docker-lint:
	runs-on: ubuntu-latest

	name: docker-lint

	steps:
	- name: Checkout
	uses: actions/checkout@v3

	- name: Install hadolint
	run: \|
	sudo wget https://github.com/hadolint/hadolint/releases/download/v2.12.0/hadolint-Linux-x86_64 -O /usr/bin/hadolint
	sudo chmod +x /usr/bin/hadolint

	- name: run lint
	run: \|
	DOCKERFILES="$(find ./Containers -name Dockerfile)"
	mapfile -t DOCKERFILES <<< "$DOCKERFILES"
	for file in "${DOCKERFILES[@]}"; do
	# DL3018 warning: Pin versions in apk add. Instead of `apk add <package>` use `apk add <package>=<version>`
	# DL3008 warning: Pin versions in apt get install. Instead of `apt-get install <package>` use `apt-get install <package>=<version>`
	# DL3002 warning: Last USER should not be root
	# DL3003 warning: Use WORKDIR to switch to a directory
	# DL3004 error: Do not use sudo as it leads to unpredictable behavior. Use a tool like gosu to enforce root
	hadolint "$file" --ignore DL3018 --ignore DL3008 --ignore DL3002 --ignore DL3003 --ignore DL3004 \| tee -a ./hadolint.log
	done
	cat ./hadolint.log
	if grep -q "DL[0-9]\+\\|SC[0-9]\+" ./hadolint.log; then
	exit 1
	fi

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