add setup instructions to README #4

	name: Deploy WASM-4 to Pages

	on:
	# Runs on pushes targeting the default branch
	push:
	branches: ["main"]

	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
	permissions:
	contents: read
	pages: write
	id-token: write

	# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
	# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
	concurrency:
	group: "pages"
	cancel-in-progress: false

	env:
	BUILD_PATH: "./" # default value when not using subfolders

	jobs:
	build:
	name: Build
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: dtolnay/rust-toolchain@stable
	- run: rustup target add wasm32-unknown-unknown
	- run: cargo build --release

	- uses: NiklasEi/wasm-opt-action@v2
	with:
	file: target/wasm32-unknown-unknown/release/cart.wasm
	output: boids-cart-opt.wasm
	options: -Oz --strip-dwarf --strip-producers --zero-filled-memory

	- run: npm install -g wasm4
	- run: w4 bundle boids-cart-opt.wasm --title "wasm-4 boids" --html dist/index.html

	- name: Upload artifact
	uses: actions/upload-pages-artifact@v3
	with:
	path: ${{ env.BUILD_PATH }}/dist

	deploy:
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}
	needs: build
	runs-on: ubuntu-latest
	name: Deploy
	steps:
	- name: Deploy to GitHub Pages
	id: deployment
	uses: actions/deploy-pages@v4

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