README.md in message_bus-2.2.0 vs README.md in message_bus-2.2.1

@@ -629,9 +629,13 @@
 * When the client subscribes to a channel starting from a message ID that is beyond the last message on that channel.
 * When delivery of messages to a client is skipped because the message is filtered to other users/groups.
 
 The values provided in this status message can be used by the client to skip requesting messages it will never receive and move forward in polling.
 
+### Publishing to MessageBus from outside of MessageBus
+
+It may be necessary or desired for integration with existing systems to publish messages from outside the Ruby app where MessageBus is running. @tgodfrey has an example of how to do that, using the Redis backend, from Elixir here: https://gist.github.com/tgodfrey/1a67753d51cb202ca8eb04b933cec924.
+
 ## Contributing
 
 If you are looking to contribute to this project here are some ideas
 
 - MAKE THIS README BETTER!