apps(prometheus): Add service montior

apps/metrics/app.yaml

@@ -8,3 +8,4 @@ resources:
   - app/metrics-sealedsecret.yaml
   - app/release.yaml
   - app/route.yaml
+  - app/monitor.yaml

apps/metrics/app/monitor.yaml

@@ -0,0 +1,20 @@
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  labels:
+    name: prometheus
+  name: prometheus
+  namespace: metrics
+spec:
+  endpoints:
+  - interval: 30s
+    targetPort: 9090
+    path: /metrics
+  - interval: 30s
+    targetPort: 8080
+    path: /metrics
+  namespaceSelector:
+    any: true
+  selector:
+    matchLabels:
+      prometheus.io/scrape: "true"