Modernize website and automate Pages deployment #1

	name: Website

	on:
	push:
	branches: [main]
	paths:
	- 'website/**'
	- '.github/workflows/website.yml'
	pull_request:
	paths:
	- 'website/**'
	- '.github/workflows/website.yml'
	# Allows deploying the current main manually from the Actions tab.
	workflow_dispatch:

	jobs:
	build:
	runs-on: ubuntu-latest
	# Superseded builds of the same branch/PR are pointless; cancel them. Keyed
	# per ref so PR builds never queue behind each other or behind a deployment.
	concurrency:
	group: website-build-${{ github.ref }}
	cancel-in-progress: true
	defaults:
	run:
	working-directory: website
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-node@v4
	with:
	# Docusaurus 3.10 segfaults on Node 24; 22 is the supported LTS.
	node-version-file: website/.nvmrc
	cache: npm
	cache-dependency-path: website/package-lock.json
	- name: Install dependencies
	run: npm ci
	- name: Build website
	run: npm run build
	- name: Upload Pages artifact
	if: github.ref == 'refs/heads/main' && github.event_name != 'pull_request'
	uses: actions/upload-pages-artifact@v3
	with:
	path: website/build

	deploy:
	needs: build
	if: github.ref == 'refs/heads/main' && github.event_name != 'pull_request'
	runs-on: ubuntu-latest
	# Only one concurrent deployment; don't cancel an in-progress one.
	concurrency:
	group: pages
	cancel-in-progress: false
	permissions:
	pages: write
	id-token: write
	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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