When requesting files, the Cache-control: no-cache header is added. Why?

Question

JavaScript

Hello everyone, I'm not very pro-shared in server administration yet.
I can’t find what exactly adds the header not to cache when requesting an image.
I have already written the rules for compression and expiration of files in htaccess.
The file is returned anyway without the Expires headers. And the Cache-control header does not disappear.
In the header of the site put the
<meta http-equiv="Cache-control" content="public">
essence does not change. Who understands this, please tell me where to dig for a solution?
Thanks in advance for participating in the discussion.
File options in htaccess:

File headers request - response (Opera 39):

Answer 1

var a = [
  {name: 'Victor'},
  {name: 'Andrew'}
].sort(function(a, b){
  var aname = a.name.toLowerCase(),
    bname = b.name.toLowerCase();
  if(aname < bname) return -1;
  if(aname > bname) return 1;
});

Answer 2

You have nginx giving statics. Those. it doesn't even reach Apache and .htaccess.