Sample usage

README.md

@@ -2,3 +2,9 @@ whoami
 ======
 
 Simple HTTP docker service that prints it's container ID
+
+    $ docker run -d -p 8080:8080 --name whoami -t jwilder/whoami
+    736ab83847bb12dddd8b09969433f3a02d64d5b0be48f7a5c59a594e3a6a3541
+    
+    $ curl $(hostname --all-ip-addresses | awk '{print $1}'):8080
+    I'm 736ab83847bb