app.json

{
  "environments": {
    "review": {
      "formation": [
        { "process": "web", "quantity": 1 },
        { "process": "worker", "quantity": 1 }
      ],
      "buildpacks": [
        { "url": "https://github.com/gaffneyc/heroku-buildpack-jemalloc.git" },
        { "url": "heroku/nodejs" },
        { "url": "heroku/ruby" },
        { "url": "https://github.com/devforce/heroku-buildpack-cleanup" }
      ],
      "addons": [
        "heroku-postgresql:mini",
        "heroku-redis:mini"
      ],
      "env": {
        "STAGING": {
          "description": "This is a staging environment",
          "value": "true"
        }
      },
      "scripts": {
        "postdeploy": "bundle exec rake heroku:postdeploy"
      }
    }
  }
}