Add support for cloning the database from a backup.

@@ -6,6 +6,9 @@ postgresql:
   version: "14"
   waitForPg:
     image: registry.opensource.zalan.do/acid/spilo-14:2.1-p6
+#  clone:
+#    uid:
+#    timestamp:
 initialAdmin:
   username: admin
   password: admin

@@ -19,6 +19,10 @@ releases:
             size: {{ .Values.postgresql.volume.size | quote }}
           postgresql:
             version: {{ .Values.postgresql.version | quote }}
+          {{- if .Values | get "clone.uid" nil }}
+          clone:
+            {{ merge .Values.clone ( dict "cluster" "kpg-postgres" ) | toYaml | nindent 12 }}
+          {{- end }}
 
   - name: kpg-keycloak
     namespace: {{ .Values.namespace }}