I stumbled upon this repository https://github.com/sparragus/slack-bot-edward-snowden when I was learning to write a bot for Slack. I saw app.json among the files and had no idea of its purpose. Can someone tell me what purpose this app.json file serve in this and other similar scenarios?
app.json is a manifest format for describing web apps. It declares environment variables, add-ons, and other information required to run an app on Heroku. This document describes the schema in detail.