app.json

{
  "name": "Sudo Sandwich",
  "description": "Example Heroku add-on built with Rails.",
  "repository": "https://github.com/heroku/sudo-sandwich",
  "formation": {
    "web": {
      "quantity": 1,
      "size": "free"
    },
    "worker": {
      "quantity": 1,
      "size": "free"
    }
  },
  "buildpacks": [
    {
      "url": "heroku/ruby"
    }
  ],
  "env": {
    "SLUG":{
      "description": "Slug for add-on. Must match 'id' value in addon-manifest.json",
      "required": true
    },
    "PASSWORD":{
      "description": "Password for basic auth. Must match 'password' value in addon-manifest.json",
      "required": true
    },
    "ENCRYPTION_KEY":{
      "description": "Encryption key for attr_encrypted attributes",
      "required": true,
      "generator": "secret"
    },
    "SSO_SALT":{
      "description": "Salt for SSO. Must match 'sso_salt' value in addon-manifest.json",
      "required": true
    }
  },
  "addons": [
    {
      "plan": "heroku-postgresql",
      "options": {
        "version": "9.5"
      }
    }
  ]
}