Update README.md with Docker instructions #24

	# Continuous Integration (CI) Workflow
	name: ci

	# See:
	# https://docs.github.com/en/actions/learn-github-actions/workflow-syntax-for-github-actions#on
	on:
	pull_request:
	branches:
	- master
	push:
	branches:
	- master

	jobs:
	lint:
	name: ESLint
	runs-on: ubuntu-latest
	steps:
	# https://github.com/actions/checkout
	- name: Check out code
	uses: actions/checkout@v3

	# https://github.com/actions/setup-node
	- name: Setup node
	uses: actions/setup-node@v3
	with:
	# Use node LTS version 18 - https://github.com/actions/setup-node#supported-version-syntax
	node-version: '18'
	# Cache npm dependencies so they don't have to be downloaded next time - https://github.com/actions/setup-node#caching-packages-dependencies
	cache: 'npm'

	- name: Install node dependencies
	#See: https://docs.npmjs.com/cli/v8/commands/npm-ci
	run: npm ci

	- name: Run ESLint
	run: npm run lint

	unit-tests:
	name: Unit Tests
	runs-on: ubuntu-latest
	steps:
	- name: Check out code
	uses: actions/checkout@v3

	- name: Setup node
	uses: actions/setup-node@v3
	with:
	node-version: '18'
	cache: 'npm'

	- name: Install node dependencies and run Tests
	# There are two ways to do this:
	# 1. run: \|
	# - npm install
	# - npm test
	#2. Use `install-ci-test` to do it in a single command, see https://docs.npmjs.com/cli/v8/commands/npm-install-ci-test
	run: npm install-ci-test

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