Add password to Alerta

Change-Id: Ib9ee9ff20e03aaa71c5d20a81b9fcb52737c12b7
PROD-Related: PROD-21265
diff --git a/docker/swarm/stack/monitoring/alerta.yml b/docker/swarm/stack/monitoring/alerta.yml
index c0da7d5..858eb38 100644
--- a/docker/swarm/stack/monitoring/alerta.yml
+++ b/docker/swarm/stack/monitoring/alerta.yml
@@ -27,4 +27,5 @@
                 - ${prometheus:alerta:config_dir}/alerta.conf:/web/config.js
               environment:
                 ADMIN_USERS: ${_param:alerta_admin_username}
-                MONGO_URI: ${_param:alerta_mongodb_uri}
\ No newline at end of file
+                ADMIN_PASSWORD: ${_param:alerta_admin_password}
+                MONGO_URI: ${_param:alerta_mongodb_uri}