[GvS]

I use the ngx_pagespeed module for Nginx for automatic image optimization. It's really good and easy to install: https://github.com/pagespeed/ngx_pagespeed

I describe the whole setup step by step on my blog: https://blog.tjl.rocks/cheap-secure-and-fast-ghost-blog-set-...

[therealmarv]

yes agree about ngx_pagespeed but personally never liked the idea of keeping care of nginx compilation (and all the modules). My advice: https://github.com/cryptofuture/nginx-hda-bundle so that you can use nginx, brotli and pagespeed all in one package :)