Add GitHub pages action

.github/workflows/deploy.yml

@@ -0,0 +1,38 @@
+name: Build Jekyll demo site
+
+on:
+  push:
+    branches: ["master"]
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Pages
+        uses: actions/configure-pages@v3
+      - name: Build
+        uses: actions/jekyll-build-pages@v1
+        with:
+          source: ./docs
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v1
+
+  deploy:
+    runs-on: ubuntu-latest
+    needs: build
+
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v2
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}