[CORD-2889]
Use premade `postgres` container

Change-Id: Ifc9a021c425d8f03c98d566978400884fbace4de
diff --git a/xos-core/templates/db-secrets.yaml b/xos-core/templates/db-secrets.yaml
new file mode 100644
index 0000000..5a5ca79
--- /dev/null
+++ b/xos-core/templates/db-secrets.yaml
@@ -0,0 +1,22 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: v1
+kind: Secret
+metadata:
+  name: xos-db-secret
+  namespace: default
+type: Opaque
+data:
+  postgres-password: {{ .Values.configs.core_config.database.password | b64enc | quote }}