improve doc

Author: mattiaerre

README.md

@@ -11,9 +11,13 @@ yarn add oc-registry-graphql-express-middleware
 ## How to use it w/in your Registry
 
 ```javascript
-const middleware = require('oc-registry-graphql-express-middleware');
+// todo: get rid of babel-*
+require('babel-core/register');
+require('babel-polyfill');
 
-registry.app.use('/graphql', middleware({ baseUrl: 'http://localhost:3000/', graphiql: true }));
+const graphql = require('oc-registry-graphql-express-middleware');
+
+registry.app.use('/graphql', graphql({ baseUrl: 'http://localhost:3000/', graphiql: true }));
 ```
 
 ![query-registry](query-registry-v2.png "query-registry")