Add GitHub Actions workflow

.github/workflows/publish.yml

@@ -0,0 +1,49 @@
+name: Deploy site
+
+on:
+  push:
+    branches: [ master ]
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+          submodules: recursive
+
+      - name: Configure GitHub Pages
+        uses: actions/configure-pages@v3
+
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.2'
+          bundler-cache: true
+
+      - name: Run Jekyll
+        # Build the site using Jekyll
+        run: JEKYLL_ENV=production bundle exec jekyll build
+
+      - name: Upload GitHub Pages artifact
+        uses: actions/upload-pages-artifact@v3
+
+  # Deployment job
+  deploy:
+    # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
+
+    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

.github/workflows/test.yml

@@ -0,0 +1,23 @@
+name: Test site build
+
+on:
+  pull_request:
+
+jobs:
+  doc-test: 
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+          submodules: recursive
+
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.2'
+          bundler-cache: true
+
+      - name: Run Jekyll
+        # Build the site using Jekyll
+        run: JEKYLL_ENV=production bundle exec jekyll build