ci: deploy demo to github pages with github action

.github/workflows/daily.yml

@@ -0,0 +1,40 @@
+name: update-demo-daily
+on:
+  schedule:
+    - cron: "0 6 * * *"
+  push:
+    tags:
+      - "refresh-github-page"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: prepare-page
+        env:
+          FEEDS: ${{vars.FEEDS}}
+        run: |
+          wget -q -O tinyfeed https://github.com/TheBigRoomXXL/tinyfeed/releases/latest/download/tinyfeed_linux_arm64
+          chmod +x tinyfeed
+          mkdir wwww
+          echo $FEEDS | ./tinyfeed -o www/index.html
+          cp www/index.html www/404.html
+
+      - name: upload-page
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: www/
+
+  deploy:
+    needs: build
+    permissions:
+      pages: write # to deploy to Pages
+      id-token: write # to verify the deployment originates from an appropriate source
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: deploy-to-github-pages
+        id: deployment
+        uses: actions/deploy-pages@v4