add defaults for cicd
diff --git a/docker/swarm/service/jenkins.yml b/docker/swarm/service/jenkins.yml
index c0b0721..3069dc6 100644
--- a/docker/swarm/service/jenkins.yml
+++ b/docker/swarm/service/jenkins.yml
@@ -1,4 +1,6 @@
 parameters:
+  _param:
+    docker_image_jenkins: tcpcloud/jenkins:2.50
   docker:
     client:
       service: