Keep Mongo operations online across Vault credential rotation

dev/config/notifications.yml

@@ -4,7 +4,12 @@ tls_key: "/run/sxchnge/server.key"
 database:
   driver: mongodb
   settings:
-    uri_env: SXCHNGE_MONGO_URI
+    uri: mongodb://mongo:27017/sxchnge_notifications?authSource=admin&replicaSet=rs0
+    vault:
+      address: http://vault:8200
+      role: notifications
+      role_id_file: /etc/agent/role-id
+      secret_id_file: /etc/agent/secret-id
     database: sxchnge_notifications
 messaging:
   driver: NATS