Adding node-exporter stats to nem-monitoring

Change-Id: I9db3f1b6ae54a702b52633b310f7248850a0e1ea
diff --git a/nem-monitoring/values.yaml b/nem-monitoring/values.yaml
index 60dd1d0..a41343b 100644
--- a/nem-monitoring/values.yaml
+++ b/nem-monitoring/values.yaml
@@ -32,6 +32,9 @@
   alertmanager:
     persistentVolume:
       enabled: false
+  nodeExporter:
+    service:
+      clusterIP: ""
   server:
     persistentVolume:
       enabled: false
@@ -64,6 +67,14 @@
             - targets:
               - xos-core-prometheus:8000
 
+        # NodeExporter
+        - job_name: 'node-exporter'
+          metrics_path: /metrics
+          scrape_interval: 15s
+          static_configs:
+            - targets:
+              - nem-monitoring-prometheus-node-exporter:9100
+
         # KB8s monitoring jobs
         - job_name: prometheus
           static_configs: