How to change static output to "assets/js assets/css assets/img" etc.?

Hi, very simple question, I know, but I could not find an answer in the docs.
I need to have all the files from the static folder put under an assets/ root folder.
How to configure this?

Create a directory named assets inside static and put everything there. Be sure to modify the paths in the template, theme and markdown files accordingly. For example your css file will be assets/css/whatever.css instead of just css/whatever.css.

This may break the theme so you may have to edit the theme.