Multisite support

Hello

I am also interested in the multi-site configuration.
The API connection looks good to me, but I have issues with the files proxy.
I tried to change the settings based on YouTube videos and this documentation
https://druxtjs.org/guide/proxy but with no luck.
And I also tried several other random values that I could think of.

What are the correct values for druxt/proxy if the public files are available here http://example.com/sites/foo/files?

None of the following works.

export default {
  druxt: {
    baseUrl: 'http://example.com/',
    proxy: {
      files: 'foo',
      files: 'sites/foo/files',
      files: 'http://example.com/sites/foo/files',
    }
  }
}

On the Nuxt frontend every IMG:src looks like this: <img src="/sites/default/files/bar.png">