All the images served by Grav have “Cache-Control: no-cache” on them. This gives us a bad performance rating. The configuration documentation suggests you could set the cache_control setting, but I’ve tried
cache_control: 'private, max-age=31536000' but that doesn’t do anything. I actually doubt if that is still a valid configuration parameter, since it was not included by default in my
How do I set the cache control instructions correctly? And should I do that in Grav at all or in Nginx?