add workflow

Author: Indosaram

.github/workflows/action.yml

@@ -15,5 +15,5 @@ jobs:
           shuttle-api-key: ${{ secrets.SHUTTLE_API_KEY }}
           project-id: proj_0123456789
           working-directory: "axum-react-chat-app/backend"
-          cargo-shuttle-version: "0.48.1"
+          cargo-shuttle-version: "0.49.0"
           extra-args: --allow-dirty --debug