diff --git a/codepot/docker/README.md b/codepot/docker/README.md
index bbf3fc00..3e3f8884 100644
--- a/codepot/docker/README.md
+++ b/codepot/docker/README.md
@@ -1,6 +1,7 @@
 If you require the root privilege to build a docker image, specify sudo in DOCKER.
 ```
 make rocky8 DOCKER="sudo docker"
+make ubnt20.04 DOCKER="sudo docker"
 ```
 
 Run the service like