I am currently running performance testing on my sites, all of which are hosted through Big Commerce (cornerstone theme, stencil). I am using webpagetest.org, and under the performance section, there is a metric "Leverage browser caching of static assets". There they have listed many images all that are hosted through Big Commerce's CDN, that have failed for no max-age or because they have expired. I spoke to a big commerce rep and I understand that all the images are cached, but is there a way to add a max-age to the cache? not sure what else to do, so any suggestions would be appreciated!
side note- I know my images are well optimized, but the cache score is the specific issue, webpagetest.org gives the cache a 52/100 score...