As @jbc1 said, it's a name of a given software https://archivebox.io/. My only extra recommendation is to enable swap limiting at the kernel level as shown in https://docs.docker.com/engine/install/linux-postinstall/#yo... to prevent headless Chromium from using it all up.

There's https://ArchiveBox.io, but also lots of other great alternatives that work similarly: https://github.com/ArchiveBox/ArchiveBox/wiki/Web-Archiving-...

There's software called ArchiveBox, it's not a thing they made up. Or are you aware and you were asking how to use it?