Add GitHub Actions workflow to lint Dockerfiles #1

	name: Lint Dockerfiles

	# This workflow performs linting for Dockerfiles
	# A successful job indicates the linting process has completed
	# Note: A successful run does not guarantee the Dockerfiles are error-free
	# The job will fail if the target folder is missing or if there is a mismatch in the folder name

	on:
	push:
	branches:
	- main
	pull_request:
	workflow_dispatch:

	jobs:
	lint-dockerfiles:
	name: ${{ matrix.folder }}
	runs-on: ubuntu-24.04

	strategy:
	fail-fast: false
	matrix:
	folder: [curl, h2load, haproxy, httpd, locust, nginx, openssh, openssl3, openvpn, wireshark, ngtcp2]

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Install jq for JSON formatting
	run: sudo apt-get install -y jq
	# Install jq to beautify JSON linting reports

	- name: Lint Dockerfiles
	run: \|
	# Check if the folder exists, otherwise fail the job
	if [ ! -d "${{ matrix.folder }}" ]; then
	echo "Folder ${{ matrix.folder }} does not exist"
	exit 1
	fi

	# Locate all Dockerfiles in the specified folder
	files=$(find ${{ matrix.folder }} -type f -name 'Dockerfile*')
	if [ -z "$files" ]; then
	echo "No Dockerfiles found in ${{ matrix.folder }}"
	exit 1
	fi

	# Lint each Dockerfile and save the output in JSON format
	for file in $files; do
	echo "Linting $file"
	docker run --rm -v "$(pwd):/workspace" -w /workspace hadolint/hadolint hadolint --no-fail --no-color --format json "$file" \| jq '.' > "${file}_lint_report.json"
	done

	- name: Upload Lint Reports
	uses: actions/upload-artifact@v4
	with:
	name: ${{ matrix.folder }}
	path: ${{ matrix.folder }}/*_lint_report.json

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