monitoring: grafana: add nginx ingress dashboard

apps/system/monitoring/values.yaml

@@ -70,6 +70,24 @@ prometheus-operator:
         auth_url: https://github.com/login/oauth/authorize
         token_url: https://github.com/login/oauth/access_token
         api_url: https://api.github.com/user
+    dashboardProviders:
+      dashboardproviders.yaml:
+        apiVersion: 1
+        providers:
+        - name: default
+          folder: ''
+          type: file
+          disableDeletion: false
+          editable: true
+          allowUiUpdates: false
+          options:
+            path: /var/lib/grafana/dashboards/default
+    dashboards:
+      default:
+        nginx-ingress:
+          gnetId: 9614
+          revision: 1
+          datasource: Prometheus
   alertmanager:
     enabled: false
   defaultRules: