Add npm serverless latest version

[alexistimic]

Description

Add package.json and npm run start command

This pull request makes the following changes:

• Add package.json

resolve issue #7

[chamathpali]

Is this tested with the yml file as well? Were you able to run ?

[alexistimic]

Since I don't have an AWS account, I couldn't verify that it actually works.
npm install has run smoothly and npm run start stopped at :

Serverless Error ---------------------------------------
 
  The security token included in the request is expired