Add more intallation instructions #455

	---
	name: Lint source files
	on: # yamllint disable-line rule:truthy
	push:

	branches:
	- main
	pull_request:

	jobs:
	markdownlint:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v3
	- name: Setup NodeJS
	uses: actions/setup-node@v3
	- name: Install markdownlint
	run: npm install -g markdownlint-cli
	- name: Run markdownlint
	run: markdownlint "*/.md"

	yamllint:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v3
	- name: Setup Python
	uses: actions/setup-python@v4
	with:
	python-version: "3.11"
	- name: Install yamllint
	run: pip install --user yamllint
	- name: Run yamllint
	run: yamllint .

	ruff:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Lint with ruff
	uses: chartboost/ruff-action@v1

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