improvement(helm): added template for external db secret (#957)

Author: waleedlatif1

helm/sim/templates/external-db-secret.yaml

@@ -0,0 +1,14 @@
+{{- if .Values.externalDatabase.enabled }}
+---
+# Secret for external database credentials
+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ include "sim.fullname" . }}-external-db-secret
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "sim.labels" . | nindent 4 }}
+type: Opaque
+data:
+  EXTERNAL_DB_PASSWORD: {{ .Values.externalDatabase.password | b64enc }}
+{{- end }}