Я получаю следующее на gtmetrix.com:
Leverage browser caching
E (55)
52%
Server High
What does this mean?
The following cacheable resources have a short freshness lifetime. Specify an expiration at least one week in the future for the following resources:
http://mysite.s3.amazonaws.com/profile.png (expiration not specified)
http://mysite.s3.amazonaws.com/circle.player.css (expiration not specified)
http://mysite.s3.amazonaws.com/main.js (expiration not specified)
http://mysite.s3.amazonaws.com/not.the.skin.css (expiration not specified)
http://cdn-images.mailchimp.com/embedcode/slim-321711.css (expiration not specified)
Я предполагаю, что файлы mailchimp не могут быть изменены. Но как указать кеш браузера для файлов Amazon S3 Cloudfront?