Style sheets in current aurelia release

I have an old app which just uses traditional stlye sheets linked in index.html

I’m trying to update that app and used au new to bootstrap the setup for a TypeScript/CSS/webpack project. I’m still new to webpack.

npm run building results in no styles being applied at runtime.
If I add an import statement to my main.ts like import '../styles/styles.css' then most of the styling appears.

Any hints on what I need to change from the default project setup to get styles to appear, or must I import it in a TS file after all? Do I need to fall back to using the CopyWebpackPlugin and just brute force copy the files to the output?