Updated readme

Author: anvaka

README.md

@@ -7,6 +7,9 @@ Since the npm registry [does not support cors](https://github.com/npm/npm-regist
 or [jsonp](https://github.com/npm/npm-registry-couchapp/issues/157) I hacked
 this together to alleviate the problem.
 
+The proxy reroutes all requests to https://skimdb.npmjs.com and returns CORS
+enabled response for whitelisted domains. The URL mapping is one to one.
+
 # install
 
 With [npm](https://npmjs.org) do:
@@ -16,7 +19,7 @@ npm install corsregistry
 ```
 
 You can deploy this to your own [heroku](https://www.heroku.com) instance.
-Just make sure to update white-listed domains in the [index.js].
+Just make sure to update white-listed domains in the [index.js](https://github.com/anvaka/corsregistry/blob/master/index.js).
 
 # license