diff --git a/Dockerfile b/Dockerfile
index 4df88d1..19253bc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,8 @@
+#
+# Usage example:
+# $ docker build -t ssh-chat .
+# $ docker run -d -p 0.0.0.0:(your host machine port):2022 --name ssh-chat ssh-chat
+#
 FROM golang:1.4
 MAINTAINER Alvin Lai <al@alvinlai.com>