update readme

README.md

@@ -5,6 +5,31 @@ A lightweight, real-time chess app built in [Node](http://nodejs.org/), [Express
 
 You can play the game on [www.retichess.com](http://www.retichess.com/).
 
+If you want to run it locally:
+* Clone the repo
+* Install dependencies
+```sh
+npm install
+```
+* Set NODE_ENV to developement
+```sh
+export NODE_ENV=development
+```
+* Run the server
+```sh
+npm start
+```
+* Preferred way is to run the server with nodemon
+```sh
+npm install -g nodemon # if you don't have nodemon installed yet
+nodemon --harmony bin/www
+```
+* Run gulp if you want to recompile static assets when you save a file
+```sh
+gulp
+```
+* App will run on **localhost:3000**
+
 License
 -------