Add Helm chart for Kubernetes deployment

README.md

@@ -100,3 +100,20 @@ The compose file builds the frontend with `VITE_BACKEND_URL=http://backend:8000`
 so it talks to the backend container.
 
 This starts the backend on port `8000`, the frontend on `3000` and a PostgreSQL instance on `5432`.
+
+## Helm Chart
+
+A Helm chart is provided under `charts/xslt-playground` to deploy the frontend and backend on Kubernetes. Before installing, create a secret with your Firebase credentials:
+
+```bash
+kubectl create secret generic firebase-config \
+  --from-file=service-account.json=</path/to/serviceAccount.json> \
+  --from-file=firebase-config.json=</path/to/firebaseConfig.json>
+```
+
+Install the chart with:
+
+```bash
+helm install xslt charts/xslt-playground
+```
+