Add a new support document as a landing page for URLs in old support … #3630

	---

	name: CI

	on:
	- pull_request

	jobs:
	Lint_JS:
	name: Lint (Javascript)
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v2

	- name: Setup Node.js
	uses: actions/setup-node@v2
	with:
	node-version: 14

	- name: Install
	run: npm ci

	- name: Lint
	run: npm run lint:js

	Lint_MD:
	name: Lint (Markdown)
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v2

	- name: Setup Node.js
	uses: actions/setup-node@v2
	with:
	node-version: 14

	- name: Setup Markdown
	uses: xt0rted/markdownlint-problem-matcher@v1

	- name: Install
	run: npm ci

	- name: Lint
	run: npm run lint:md

	Build:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v2

	- name: Setup Node.js
	uses: actions/setup-node@v2
	with:
	node-version: 14

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

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

	- name: Build
	run: npm run build

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