[examples/physics] add demo for using jsdelivr instead of a bundler #178

	# Workflow to build a GitHub Pages site for all examples and tutorials
	# and deploy it to https://croquet.github.io/worldcore/

	# The actual work is done in scripts/build-pages.sh

	# NOTE: to make this work, in GitHub Settings under Pages – Build and Deployment
	# change Source from "Deploy from a branch" to "GitHub Actions"!

	name: Deploy to Pages

	on:
	# only execute on push to main
	push:
	branches:
	- main
	# or manually in the GitHub UI
	workflow_dispatch:

	permissions:
	contents: read
	pages: write
	id-token: write

	concurrency:
	group: pages
	cancel-in-progress: true

	jobs:
	deploy:
	# only run on main repo and not forks
	# (change this in your fork if you want it there)
	if: github.repository == 'croquet/worldcore'
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0 # fetch full history

	- name: Configure pages
	uses: actions/configure-pages@v4

	- name: Use Node.js 18
	uses: actions/setup-node@v4
	with:
	node-version: 18

	- name: Build tutorials and examples
	env:
	SLACK_HOOK_URL: ${{ secrets.SLACK_HOOK_URL }}
	run: scripts/build-pages.sh

	- name: Upload _site
	uses: actions/upload-pages-artifact@v3

	- name: Deploy to GitHub Pages
	id: deployment
	uses: actions/deploy-pages@v4

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