Add details about running insight using pm2.

README.md

@@ -185,12 +185,19 @@ If you are using node instead of grunt, it is very similar:
 	$ NODE_ENV=test node server
 
 
-### Development enviroment
+### Development environment
 To run insight locally for development:
 
   $ NODE_ENV=development grunt
 
 
+### Production
+You can use [pm2](https://github.com/Unitech/pm2) to manage NodeJS in production:
+
+  $ npm install pm2 -g
+  $ pm2 start insight.js
+
+
 ## Github
 [Insight](https://github.com/bitpay/insight)