docs: add instruction of using gitpod #13

	name: Code coverage
	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]

	env:
	USE_BABEL_PLUGIN_ISTANBUL: 1

	jobs:
	build:
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v3
	- name: Use Node.js
	uses: actions/setup-node@v3
	with:
	node-version: 18
	- name: Run install
	uses: borales/actions-yarn@v4
	with:
	cmd: install
	- run: yarn playwright install
	- name: Run test
	run: yarn test
	- name: Run end-to-end tests
	run: npm test
	- run: npx nyc report --reporter=lcovonly
	- name: Upload to Coveralls
	if: always()
	uses: coverallsapp/github-action@v2
	with:
	github-token: ${{ secrets.GITHUB_TOKEN }}

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