YunoHost Virtual Machine
I had trouble with the direct installation of the preinstalled YunoHost image in VirtualBox so I switched to a bare-bones installation of Debian 12, and then installed YunoHost on top of it. This also resulted in a more up-to-date YunoHost installation, so no harm done.
Debian Install
Debian was installed through the text-based installer using stock settings other than the selected packages. Because I wanted the smallest installed size I could get away with I unchecked any desktop environments and installed only the SSH server and standard system utilities. I'm not sure what standard system utilities encompasses, but I figured I wouldn't mind having them. Once installation was complete, I installed curl with apt and then the system was ready for the YunoHost installation