Add prerequisites to guides #2621

	name: Docs CI/CD

	on:
	push:
	workflow_dispatch:

	jobs:
	test:
	runs-on: ubuntu-latest
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	steps:
	- uses: actions/checkout@v2

	- name: Read .tool-versions
	uses: marocchino/tool-versions-action@v1
	id: versions

	- uses: actions/setup-node@v2
	with:
	node-version: ${{ steps.versions.outputs.nodejs }}

	- name: Install yarn
	run: npm install -g yarn

	- name: Get yarn cache directory path
	id: yarn-cache-dir-path
	run: echo "::set-output name=dir::$(yarn cache dir)"

	- uses: actions/cache@v1
	id: yarn-cache
	with:
	path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
	key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
	restore-keys: \|
	${{ runner.os }}-yarn-

	- name: Install dependencies
	run: yarn install

	- name: Type check
	run: yarn run type-check

	- name: Lint code
	run: yarn run lint

	- name: Check formatting
	run: yarn run format.check

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