How to provide icons in theme

I maintain Jekyll theme for internal use (like branded sites) and this theme hould also contain favicon.ico and other icons for all browsers (generated by amazing

The cleanest will be to include all icons in assets folder and link them from , but some is good to have in the root (some browsers preloads them by trying /favicon.ico etc., see

Is it possible to make theme to add some files to site root in build time (like it copy all files from the assets folder)?