app.json

{
    "name": "Slackbot",
    "description": "Build your own slackbot base",
    "website": "https://github.com/macobo/slackbot",
    "success_url": "/",
    "keywords": [
        "chatbot",
        "bot",
        "slack",
        "ruby"
    ],
    "env": {
        "SLACK_API_TOKEN": {
            "required": true,
            "description": "Token from https://api.slack.com/#auth. Used to send private messages"
        },
        "SLACK_WEBHOOK_TOKEN": {
            "required": false,
            "description": "(not required) Found at https://stripe.slack.com/services/new/outgoing-webhook"
        },
        "BUILDPACK_URL": "https://github.com/heroku/heroku-buildpack-ruby"
    }
}