Update service.yml

kubernetes/frontend/templates/service.yml

 apiVersion: v1
 kind: Service
 metadata:
-name: frontend
+  name: frontend
 spec:
-type: LoadBalancer
-ports:
-port: 80
-targetPort: 80
-nodePort: 31730
-selector:
-app: frontend
\ No newline at end of file
+  type: LoadBalancer
+  ports:
+  - port: 80
+    targetPort: 80
+    nodePort: 31730
+  selector:
+    app: frontend
\ No newline at end of file