hack-commit-push raffle application

Environment

SLACK_TOKEN envvar: Slack token including at least groups:read, users:read and users:read.email permissions.
PORT (optional, default: 3000) envvar: HTTP port for the server to listen to
PRIZE_FILE (optional, default: ./samples/prizes.json) envvar: static JSON file for prize data

Note that the corresponding bot should be invited to private channels before the token can be used to retrieve those.

 $ npm install
 $ node index.js
Listening at http://localhost:3000

And browse 😎!