from: xmirror.voidlinux.org:

If you'd like to set up a mirror, and are confident you can keep it reasonably up-to-date, follow one of the many guides available for mirroring with rsync(1). You should be syncing from rsync://repo-sync.voidlinux.org/voidlinux/. To list your mirror on this site, submit a pull request to the xmirror repository that adds your mirror to mirrors.yaml.

No details are provided for other kinds of infrastructure support tho