feat(k3s): add trade-frontend service

kustomize/base/frontend/service.yaml

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: trade-frontend
+spec:
+  type: ClusterIP
+  selector:
+    app.kubernetes.io/name: trade-frontend
+  ports:
+    - name: http
+      port: 8081
+      targetPort: http