Bundle external web fonts?

I have a CSS import in one of my dependencies like so:

@import url(https://fonts.googleapis.com/css?family=Material+Icons);

Is it possible to, via plugin or otherwise, tell esbuild to download a copy of this font and bundle it as a dataurl, instead of relying on the external server?

(I'm creating a self-hosted web app that needs to be able to run without internet access.)