add infra app prometheus

kubernetes/infrastructure/prometheus/app/service.yaml

@@ -0,0 +1,16 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: prometheus
+  namespace: prometheus
+  annotations:
+    prometheus.io/scrape: 'true'
+    prometheus.io/port:   '9999'
+spec:
+  selector:
+    app: prometheus
+  type: NodePort
+  ports:
+    - port: 9999
+      targetPort: 9999
+      nodePort: 30999