[Snyk] Security upgrade express from 4.18.1 to 4.21.0 #25

	name: Package lock lint

	# What it does: Makes sure package.json and package-lock.json is in sync
	# Why we have it: Accidental manual edits of the dependencies directly in package.json
	# Who does it impact: Docs engineering/writers/contributors.

	on:
	pull_request:
	paths:
	- package.json
	- package-lock.json
	- .github/workflows/package-lock-lint.yml

	permissions:
	contents: read

	# This allows a subsequently queued workflow run to interrupt previous runs
	concurrency:
	group: '${{ github.workflow }} @ ${{ github.event.pull_request.head.label \|\| github.head_ref \|\| github.ref }}'
	cancel-in-progress: true

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- name: Check out repo
	uses: actions/checkout@dcd71f646680f2efd8db4afa5ad64fdcba30e748

	- name: Setup Node
	uses: actions/setup-node@17f8bd926464a1afa4c6a11669539e9c1ba77048
	with:
	node-version: '16.15.0'

	- name: Run check
	run: \|
	npm --version

	# From https://docs.npmjs.com/cli/v7/commands/npm-install
	#
	# The --package-lock-only argument will only update the
	# package-lock.json, instead of checking node_modules and
	# downloading dependencies.
	#
	npm install --package-lock-only --ignore-scripts --include=optional

	# If the package.json (dependencies and devDependencies) is
	# in correct sync with package-lock.json running the above command
	# should not make an edit to the package-lock.json. I.e.
	# running `git status` should
	# say "nothing to commit, working tree clean".
	git diff --exit-code

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