chore: add contributing guide #79

	name: Lint PR

	on:
	pull_request:
	types: ['opened', 'edited', 'reopened', 'synchronize']
	branches:
	- staging

	jobs:
	commitlint:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	node-version: [ 18 ]

	defaults:
	run:
	working-directory: ${{ github.workspace }}

	steps:
	- uses: actions/checkout@v3
	with:
	# we need + 1 commit
	fetch-depth: 2

	- uses: pnpm/action-setup@v2
	with:
	version: 8

	- name: Use Node.js ${{ matrix.node-version }}
	uses: actions/setup-node@v3
	with:
	node-version: ${{ matrix.node-version }}
	cache: 'pnpm'

	- name: Install dependencies
	run: pnpm install --frozen-lockfile

	- name: Lint pull request commit message when it has a single commit
	if: ${{ github.event.pull_request.commits == '1' }}
	run: \|
	echo "Since your PR has a single commit, this commit should adhere to the commit message convention."
	echo "correct format: <type>(<scope>): <subject>"
	echo "example: feat: add dialbot icon"
	echo "Please amend your commit message (git commit --amend) if commitlint reports an error and push using: git push --force-with-lease"
	git show -s --format=%B HEAD^2 \| npx commitlint --verbose

	- name: Lint pull request title
	run: \|
	echo "The PR's title should adhere to the commit message convention."
	echo "correct format: <type>(<scope>): <subject>"
	echo "example: feat: add dialbot icon"
	npx commitlint --verbose << EOF
	${{ github.event.pull_request.title }}
	EOF

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