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document: refuse an empty GIF frame and a huge index range #16

	name: Build and deploy demo site
	on:
	push:
	branches: [main]
	pull_request:
	workflow_dispatch:
	permissions: {}
	concurrency:
	group: pages-${{ github.ref }}
	cancel-in-progress: true
	jobs:
	build:
	runs-on: ubuntu-latest
	timeout-minutes: 20
	permissions:
	contents: read
	steps:
	- uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
	with:
	persist-credentials: false
	submodules: true # the hugo-book theme for the docs
	- uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7
	with:
	go-version-file: go.mod
	cache-dependency-path: \|
	go.sum
	examples/demo/go.sum
	- uses: go-task/setup-task@a00fbb05ce67b35648be3c78cbc9fd85354c757e # v2
	with:
	version: '3.x'
	- uses: peaceiris/actions-hugo@2752ce1d29631191ea3f27c23495fa06139a5b78 # v3
	with:
	hugo-version: '0.167.0'
	extended: true
	- run: task web-check demo-check build-wasm-site
	# The documentation is the site's /docs/, beside the demo.
	- run: task docs:hugo:build -- --destination ../../web/dist/docs
	- uses: actions/upload-pages-artifact@fc324d3547104276b827a68afc52ff2a11cc49c9 # v5
	with:
	path: web/dist
	deploy:
	if: github.ref == 'refs/heads/main' && github.event_name != 'pull_request'
	needs: build
	runs-on: ubuntu-latest
	permissions:
	pages: write
	id-token: write
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}
	steps:
	- uses: actions/configure-pages@45bfe0192ca1faeb007ade9deae92b16b8254a0d # v6
	- id: deployment
	uses: actions/deploy-pages@368f82528645a54fb793d4d04e342629a3f51346 # v5