fix: /api/datasets/{pk}/coverage/ in Pelican observed to take 52s #258

	name: Accessibility
	on: [push, pull_request]
	jobs:
	build:
	if: github.event_name == 'push' \|\| github.event.pull_request.head.repo.full_name != github.repository
	# https://github.com/pa11y/pa11y-ci#pa11y-ci-3-and-ubuntu
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-node@v4
	with:
	node-version: 18
	cache: npm
	cache-dependency-path: "**/package-lock.json"
	- uses: actions/setup-python@v5
	with:
	python-version: '3.11'
	cache: pip
	cache-dependency-path: '*/requirements.txt'
	- run: npm install
	- run: pip install -r requirements.txt
	- name: Build
	env:
	DATABASE_URL: postgresql://postgres:postgres@localhost:${{ job.services.postgres.ports[5432] }}/postgres
	shell: bash
	run: \|
	npx webpack --mode production
	env DJANGO_ENV=production python manage.py collectstatic --noinput -v2
	python manage.py migrate
	python manage.py loaddata tests/fixtures/a11y.json
	- name: Serve
	env:
	DATABASE_URL: postgresql://postgres:postgres@localhost:${{ job.services.postgres.ports[5432] }}/postgres
	run: \|
	python manage.py runserver &
	sleep 5
	- run: npx pa11y-ci -c pa11y.default.json -s http://127.0.0.1:8000/sitemap.xml
	- run: npx pa11y-ci -c pa11y.mobile.json -s http://127.0.0.1:8000/sitemap.xml
	services:
	postgres:
	image: postgres:16
	env:
	POSTGRES_PASSWORD: postgres
	options: >-
	--health-cmd pg_isready
	--health-interval 10s
	--health-timeout 5s
	--health-retries 5
	ports:
	- 5432/tcp

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