From episode "5 - Setting Up Universal Links (Deep Linking)" on the Inside iOS Dev Podcast

1) Create an apple-app-site-association file that contains JSON data about the URLs that your app can handle.

• Create apple-app-site-association text file without .json file extension
• Use application/json MIME type for the text file
• Have the following contents of the file similar to this format:

   {
   	"applinks": {

"apps": [],