docs: rewrite README #20

	name: Deploy to GitHub Pages

	# Builds the static SPA and publishes dist/ to GitHub Pages on every push to main.
	# The data artifacts under public/index/ are generated by `npm run bake` (which the
	# build's prebuild hook runs), so a clean checkout still ships a complete site.

	on:
	push:
	branches: [main]
	workflow_dispatch: {}

	# Allow the workflow to publish to Pages.
	permissions:
	contents: read
	pages: write
	id-token: write

	# One in-flight deploy at a time; don't cancel a running publish.
	concurrency:
	group: pages
	cancel-in-progress: false

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Set up Node
	uses: actions/setup-node@v4
	with:
	node-version: '20'
	cache: 'npm'

	- name: Install dependencies
	run: npm ci

	# `npm run build` runs `npm run bake` first (prebuild hook), regenerating
	# public/data + public/index, then `tsc --noEmit && vite build` with the
	# /InvaderGIS/ base baked in.
	- name: Build
	run: npm run build

	- name: Upload Pages artifact
	uses: actions/upload-pages-artifact@v3
	with:
	path: dist

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

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