feat: annotation to be compatible with prom helm chart

Author: PierreZ

deployment/kubernetes/fdb-metrics-pod.yaml

@@ -2,6 +2,10 @@ apiVersion: v1
 kind: Pod
 metadata:
   name: fdb-prometheus-exporter
+  annotations:
+    prometheus.io/scrape: "true"
+    prometheus.io/path: /metrics
+    prometheus.io/port: "8080"
 spec:
   containers:
     - image: pierrezemb/fdb-prometheus-exporter:latest