Add deploy.yml worfklow, downloading build artifact

.github/workflows/deploy.yml

@@ -0,0 +1,24 @@
+name: Deploy HUGO website
+
+on:
+  push:
+    branches: ["main"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "deploy"
+  cancel-in-progress: false
+
+jobs:
+  # Deployment job
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download build Artifacts
+        uses: actions/download-artifact@v3
+        with:
+          name: build