app.json

{
  "name": "My Rails Application",
  "description": "Heroku review apps from GitHub PRs",
  "scripts": {
    "postdeploy": "bin/rails heroku:postdeploy heroku:review_app_setup",
    "pr-predestroy": "bin/rails heroku:review_app_predestroy"
  },
  "formation": {
    "web": {
      "quantity": 1
    },
    "worker": {
      "quantity": 1
    }
  },
  "stack": "heroku-18",
  "buildpacks": [
    {
      "url": "heroku/ruby"
    },
    {
      "url": "https://github.com/heroku/heroku-buildpack-activestorage-preview"
    },
    {
      "url": "heroku/jvm"
    },
    {
      "url": "heroku-community/apt"
    },
    {
      "url": "https://github.com/codeforamerica/heroku-pdftk-java-buildpack.git"
    }
  ],
  "env": {
    "LOG_LEVEL": {
      "value": "info"
    },
    "RACK_ENV": {
      "value": "production"
    },
    "RAILS_ENV": {
      "value": "heroku"
    },
    "RAILS_SERVE_STATIC_FILES": {
      "value": "enabled"
    },
    "SECRET_KEY_BASE": {
      "description": "Secret key base for Rails.",
      "generator": "secret"
    },
    "HEROKU_APP_NAME": {
      "required": true
    }
  },
  "addons": [
    "heroku-postgresql"
  ]
}