Improve readme file

Author: ivanvs

README.md

@@ -17,9 +17,10 @@ For creating React app we have used [crate-react-app](https://github.com/faceboo
 # How To Start Application?
 
 * Start MongoDB - our application expects that there is `twitter-demo` database in MongoDB
+* Put Twitter secret and key in [passport.js](https://github.com/GenFirst/react-node-twitter-login/blob/master/backend/passport.js) and [server.js](https://github.com/GenFirst/react-node-twitter-login/blob/master/backend/server.js) files
 * Go to [frontend](https://github.com/GenFirst/react-node-twitter-login/tree/master/frontend) folder
     * `npm install`
-    * `ng serve`
+    * `npm start`
 * Go to [backend](https://github.com/GenFirst/react-node-twitter-login/tree/master/backend) folder
     * `npm install`
     * `gulp develop`