Updates on custom Themes for Suitecrm 8.x

Hi Team, does anyone have updates on how to create your custome themes in Suitecrm 8.x? In 7.x it worked like a charm but i couldnt find any way yet to replicate it in v8. So far i didnt even find any post from someone who successfully achieved it.

Happy to hear any news as i would like to bring our companies CI into Suitecrm.

Best regards,