Tom Forrer

@gperdomor Thank you for the very quick fix! I can confirm `3.0.3-alpha.1` is working as expected in self-hosted Github actions runners again (with the `docker context create github-selfhosted-context` step above)....

The problem is that the interface of the `postcss-loader` has changed, and now the CRA `webpack.config.js` nests the loader options in `options.postcssOptions`: https://github.com/facebook/create-react-app/blob/f34d88e30c7d8be7181f728d1abc4fd8d5cd07d3/packages/react-scripts/config/webpack.config.js#L133-L144 while `customize-cra`'s `addPostcssPlugins` looks for `options.ident ===...