Create deploy_to_gh_pages_vanilla.yaml

Author: AB527

.github/workflows/deploy_to_gh_pages_vanilla.yaml

@@ -0,0 +1,45 @@
+name: Deploy to GitHub Pages (Vanilla)
+
+on:
+  push:
+    branches: ["prod/iiitnr"]
+
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Add 404.html fallback
+        run: |
+          if [ -f index.html ]; then
+            cp index.html 404.html
+          fi
+
+      - name: Add CNAME for custom domain
+        run: echo "${{ secrets.PROJECT_DOMAIN }}" > CNAME
+
+      - name: Upload GitHub Pages artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: .
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4