added 'monitoring' path - ask devs why it's there

monitoring/cast04/grafana-provisioning/datasources/prometheus.yaml

@@ -0,0 +1,12 @@
+# Auto-provision Prometheus datasource on first Grafana start
+apiVersion: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    url: http://localhost:9090
+    isDefault: true
+    editable: false
+    jsonData:
+      timeInterval: "15s"