Fix protocol-relative URLs in speakerdeck embeds #16

	name: Build and deploy Jekyll site

	on:
	push:
	branches: ["main"]
	workflow_dispatch:

	permissions:
	contents: write
	pages: write
	id-token: write

	concurrency:
	group: "pages"
	cancel-in-progress: false

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

	- name: Setup Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: "3.3.4"
	bundler-cache: true

	- name: Persist Gemfile.lock if missing
	run: \|
	if ! git ls-files --error-unmatch Gemfile.lock >/dev/null 2>&1; then
	git config user.name "github-actions[bot]"
	git config user.email "github-actions[bot]@users.noreply.github.com"
	git add Gemfile.lock
	git commit -m "Add Gemfile.lock for reproducible builds" \|\| true
	git push \|\| true
	fi
	continue-on-error: true

	- name: Setup Node
	uses: actions/setup-node@v4
	with:
	node-version: "20"
	cache: "npm"

	- name: Install npm dependencies
	run: npm ci

	- name: Lint Markdown
	run: bundle exec rake markdown_lint

	- name: Lint SCSS
	run: npm run stylelint

	- name: Build with Jekyll
	run: bundle exec jekyll build
	env:
	JEKYLL_ENV: production

	- name: Run HTML Proofer
	run: bundle exec rake html_proofer

	- name: Upload artifact
	uses: actions/upload-pages-artifact@v3

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

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