Define explicit NPM start script
Define explicit NPM start script

Heroku runs "npm start" for a NodeJS app if no Procfile is present.
The default NPM start script runs "node server.js".  Because our
application entry point is located in a file other than "./server.js",
we must explicitly define the NPM start script to point to the correct
location.

ssoloff/dice-server-js,ssoloff/dice-server-js,ssoloff/dice-server-js,ssoloff/dice-server-js