Far Future Expiration Headers of Assets

Hi!

About my T5.4 site, Google is complaining that "resources are missing
a cache expiration. Resources that do not specify an expiration may
not be cached by browsers . . . "

I read that "assets get a far-future expires header" and will be
"client browsers will aggressively cache downloaded assets." So I am
not sure why responses for my assets all come with
"Cache-Control:no-cache" and "Pragma:no-cache".

Any help would be appreciated. Thanks!

Best Regards
Harry