app.json

{
  "name": "rss2html",
  "description": "PHP script to convert RSS feeds into HTML, suitable for embedding in webpages.",
  "repository": "https://github.com/bmann/rss2html",
  "keywords": ["php", "rss", "html"],
  "env": {
    "APP_URL": {
      "description": "The URI where your site is running, which should start as your app name. You can update this manually later if you add your own custom domain.",
      "value": "YOUR_APP_NAME.herokuapp.com"
    }
  }
}