Set Referrer-Policy to recommended value #371

	name: Node.js CI

	on: [push]

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0

	- name: Setup Node.js
	uses: actions/setup-node@v1
	with:
	node-version: '15.x'

	- name: Cache node_modules
	id: cache-node-modules
	uses: actions/cache@v2
	with:
	path: node_modules
	key: node-modules-${{ hashFiles('package-lock.json') }}

	- name: Install dependencies
	if: steps.cache.outputs.cache-hit != 'true'
	run: npm ci

	# Build Eleventy site
	- name: Eleventy build
	run: npm run build

	# Notify on Slack!
	- uses: 8398a7/action-slack@v3
	with:
	status: ${{ job.status }}
	fields: repo,message,commit,author,action,eventName,ref,workflow,job,took
	env:
	SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
	if: always()

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