I have created a simple test web app using Apps Script. I would like to deploy the web app url on an iPhone/iPad home screen with a custom icon. When I add the web app with “Add to Home Screen” I just get the default icon (e.g. “A” on a light square). I have been looking at the documentation and I suspect it could be because Apps Script will not allow me to create a directory, “apple-touch-icon”, in the app root and place the icon files in it. I am therefore using direct links to the icons hosted in imgur and postimg. Can anyone determine where my code is wrong: