title: JSON link in amp-list is not loading
body: <p>I'm trying to load dynamic data to my amp page. For testing I tried one of the examples(amp-list) from google playground. 
  But the server I'm currently on is http. AMP requires https link for the json file to work. So I moved the file to another https server. But when I give the https link of the json file from the external server, the data isnt loading. 
  When I use the same json file from the google-amp server the data loads perfectly. 
  Please help. </p>