How about Nextcloud? If that works, you could host Nextcloud on that computer and use that for booting another computer. Better yet, you could make several layers of bootception that way. Here’s how. Computer A runs whatever distro + Nextcloud and hosts an Arch image. Computer B uses that image to boot up only to run Nextcloud and another image of Arch. Then computer C uses the image hosted on B that and so on. If you want to aim for the next level circular bootception, you make computer A use the image hosted on computer Z.