Fix nesting depth in Array.prototype.flat example #1247

	name: Testing, building, serving

	on:
	pull_request:

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3

	- name: Setup Node.js environment
	uses: actions/setup-node@v3
	with:
	node-version: 18
	cache: npm

	- name: Install all npm packages
	run: npm ci

	- name: Lint JS code
	run: npm run lint:js

	- name: Lint CSS code
	run: npm run lint:css

	- name: Build all
	run: npm run build

	- name: Start server
	run: \|
	npm run start-server > /tmp/stdout.log 2> /tmp/stderr.log &

	sleep 3
	curl --retry-connrefused --retry 5 http://localhost:9090 > /dev/null

	- name: View some built pages
	run: \|
	# This depends on actual content.
	# Arbitrary pages picked. The tests just makes sure they 200 OK
	curl --fail --silent http://localhost:9090/pages/tabbed/video.html > /dev/null
	curl --fail --silent http://localhost:9090/pages/js/array-foreach.html > /dev/null
	curl --fail --silent http://localhost:9090/pages/css/background.html > /dev/null

	- name: Debug server's stdout and stderr if tests failed
	if: failure()
	run: \|
	echo "STDOUT..................................................."
	cat /tmp/stdout.log
	echo ""
	echo "STDERR..................................................."
	cat /tmp/stderr.log

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