Monitoring your application performance

[@LryuzakiLN]

Hi, can this be achieved using nginx??? Or should I go with Varnish??? Let's say I have images in /var/www/images directory, I want nginx to cache these images and serve from cache using the "proxy_cache" directive, but nginx doesn't seem to cache any of the images however I try. It is achievable??? It only works for text based data for example to cache an API response. Please let me know if that's really possible with nginx???