How to setup Ubuntu base ?

For those who don't know what Ubuntu base is, it's a minimal version of Ubuntu, and when i mean minimal it's REALLY minimal (the rootfs is like 80MB). The installation is a bit like Arch except you gotta install everything like the init system, the initramfs tools etc... i know i could just use Ubuntu server but snaps are included unlike Ubuntu base. I just need to know what i need to install.

Edit : I already know what to install, i just need to know what was missing because i used this guide on my first install (because yes, i already made another install) but instead of getting the random deb package that was asked to install, i installed them via apt, and there was missing packages. If you're wondering why i am not picking another distro, that's because i'm searching for a distribution between cutting edge and stable, and Ubuntu is the only distro i found with that, the problem is... yes, snapd, and Ubuntu Base is the only one i found that doesn't contain snapd...