How to use Sass with SwiftNIO, sourcemaps, and browser style editor?

has anyone used Sass with SwiftNIO and the firefox style editor? i have a SwiftNIO application that serves a static CSS file (compiled from SCSS), and i would like to edit the original SCSS in the firefox style editor (using Sass’s --source-map feature) and observe the changes in the browser.

i was able to edit the raw CSS in this way, because firefox is able to “overlay” the edited CSS atop the original CSS served by the application (which cannot observe changes directly) but i have no idea how to make this work with SCSS.

I suppose it is not exactly your question, but I have GitHub - helje5/WebPackMiniS: A super simple mini version of WebPack written in Swift, not sure that helps.