Update README.md

Author: sriniwasgr

Diff for: README.md

@@ -15,6 +15,15 @@ As any other ember-cli add on, run:
   ```
   ember install ember-batch-request
   ```
+  
+### Setup
+
+Since the [Rails middleware](https://github.com/Netflix/batch_request_api) depends on the url ```/api/v1/batch_sequential``` or ```/api/v1/batch_sequential```, please add the following config to environment.js
+
+```
+ENV.apiNamespace = 'api/v1';
+ENV.apiBatchUrl = 'batch_parallel'; (or batch_sequential)
+```
 
 ### Usage