Self hosting + WinPE image?

[IngwiePhoenix]

I am looking into self-hosting a little bit of network booting for when I have a PC here that needs fixing and I can't be bothered to flash a USB drive (again) with any given tool as well as having a way to install Windows and apply a backup right away.

The idea is simple: WinPE image + Duplicati tools and a few others, and host that on netboot.xyz locally via my home server (OpenWrt based aarch64 SBC with 8 cores at about 2GHz).

LuCi - OpenWrt's config - already provides me the option to easily add a TFTP server. So all that I need to do from here is to somehow make netboot.xyz aware of my WinPE ISO image and have it offer that image to clients.

How would I go about doing the latter?

Thanks!