README.md in rasti-web-broadcaster-1.0.0 vs README.md in rasti-web-broadcaster-1.1.0

@@ -36,9 +36,12 @@
 ```
 
 ### Rack middleware
 ```ruby
 use Rasti::Web::Broadcaster
+
+headers = {'Access-Control-Allow-Origin' => '*'}
+use Rasti::Web::Broadcaster, headers
 ```
 
 ### Publishing events from the web
 ```ruby
 Rasti::Web::Broadcaster.publish channel_id, data:  'hello'      # string or json