In order to run this app:

• Install node.js.
• Install yarn.
• Sign up for a free ipstack API key.
• Clone the repository.
• Install dependencies using yarn.
• Make a new app at Heroku, and add the Heroku Redis add-on (free plan) and note the app URL.
• Add a config var APP_URL (usually {app_name}.herokuapp.com)
• Make a Slack webhook for a slack-channel and note the URL, add them as config vars named SLACK_URL & SLACK_CHANNEL.
• Deploy to Heroku.
• Have anyone who wants to contribute add the webhook on https://app.plex.tv/web/app#!/account/webhooks

Alternatively, deploy straight to Heroku now:

You'll be asked to complete these config vars

SLACK_URL      # your slack webhook URL
SLACK_CHANNEL  # the slack #channel-name to post messages
APP_URL        # the App URL ({app_name}.herokuapp.com)
IPSTACK_KEY    # your ipstack API key