feat(site): one-command installer + subtle light-mode code blocks #5

	name: Deploy site to GitHub Pages

	on:
	push:
	branches: [main]
	paths:
	- 'site/**'
	- 'docs/**'
	- '.github/workflows/pages.yml'
	workflow_dispatch:

	# Required for the official GitHub Pages deploy action.
	permissions:
	contents: read
	pages: write
	id-token: write

	# Serialize concurrent deploys; cancel superseded in-progress runs.
	concurrency:
	group: pages
	cancel-in-progress: true

	jobs:
	build:
	name: Build Astro site
	runs-on: ubuntu-latest
	defaults:
	run:
	working-directory: site
	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Install pnpm
	uses: pnpm/action-setup@v4
	with:
	version: 9

	- name: Setup Node
	uses: actions/setup-node@v4
	with:
	node-version: 20
	cache: pnpm
	cache-dependency-path: site/pnpm-lock.yaml

	- name: Install dependencies
	run: pnpm install --frozen-lockfile

	- name: Configure Pages
	id: pages
	uses: actions/configure-pages@v5

	- name: Build
	run: pnpm build
	env:
	# Honour the base path that Pages will actually serve us from.
	# For a project site this is /<repo>/ — we already hard-code
	# /source-code in astro.config.mjs; this env just pins it.
	PAGES_BASE_PATH: ${{ steps.pages.outputs.base_path }}

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

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

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