build: automatic deploy to cloud run

.github/workflows/action.yml

@@ -112,3 +112,29 @@ jobs:
         env:
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
   
+  deploy-demo:
+    name: Deploy Demo to Cloud Run
+    runs-on: ubuntu-latest
+    environment: demo
+    needs: docker
+    permissions:
+      id-token: write
+
+    steps:
+      - name: Authenticate with Google Cloud
+        uses: google-github-actions/auth@f112390a2df9932162083945e46d439060d66ec2 # v2.1.4
+        with:
+          credentials_json: ${{ secrets.GCP_SA_KEY }}
+
+      - name: Set up Cloud SDK
+        uses: google-github-actions/setup-gcloud@f0990588f1e5b5af6827153b93673613abdc6ec7 #v2.1.1
+
+      - name: Deploy to Cloud Run
+        run: |
+          gcloud run deploy opds-proxy \
+            --image=evanbuss/opds-proxy:edge \
+            --platform=managed \
+            --region=us-central1 \
+            --allow-unauthenticated
+      
+