How to set a web service on AMAZON (AWS) which is running a NODEJS server?

How to set up the connection between client (eg:MY Mobile browser) and the AWS Server which is running NODE server on it?

  • Is Web service is required?
  • If so which one?
  • How to set up the web service?

A code snippet of setting a simple web-service would help me

Use NODEJS or EXPressJS get the server running !

Then use something like 

http://Serverip::port

to access from your mobile

that should work