I have a simple Rails 6 app with ActiveStorage. I use local disk storage. When I inspect responses from representation url like this
http://localhost:3000/rails/active_storage/disk/some-long-hash/IMG_0951.jpeg?content_type=image%2Fjpeg&disposition=inline%3B+filename%3D%22IMG_0951.jpeg%22%3B+filename%2A%3DUTF-8%27%27IMG_0951.jpeg
I see headers Cache-Control: max-age=0, private, must-revalidate
The question is how to make Rails to set public caching header with some age?