Files in public folder not copying with create-react-app

Question

I wanted to add a second stylesheet to my app that would be loaded by the server instead of javascript.

So I placed the file in the public folder. Then ran craco start.

It makes the build directory, with index.html, asset-manifest.json, and static/, but it isn't copying any other files I have in the public folder, such as the css I placed there, or the favicons that come packaged with cra.

Why isn't it copying the other files?

Note: I am overriding my webpack config with craco to turn writeToDisk on while in development.

// craco.config.js

module.exports = {
    devServer: (devServerConfig, { env, paths, proxy, allowedHost }) => {
        devServerConfig.devMiddleware.writeToDisk = true;
        return devServerConfig;
    },
}