Because it uses Docker and that is what Docker requires.
Those minimums are taken from Docker. The person above asked why they were what they were, I answered. You're just further reinforcing what I explained.
If you were running the Bitwarden server on bare metal (which you can definitely do), the requirements would still be the same.
- https://docs.docker.com/desktop/install/linux-install/
HN has reached the point, that it will heavily downvote an objective fact because it goes against the pointed narrative. They took a dependency, copied its system requirements, and someone asks "why?" and that is the actual answer.
A lot of the other answers (multiple Dockers, slimmer image) really address how Docker themselves have these exact system requirements listed, but why do they need to when the point isn't to answer the actual request asked by get lost into a predisposed critique.
Side note: WTF is Docker Desktop on Linux using a VM? I can't even.
With the requirements on here: https://docs.docker.com/engine/install/binaries/
It doesn't even mention space because it's negligible. dockerd uses a few megabytes of ram and around 100MB of drive.
Having facts doesn't always mean you're right. Sometimes it's the wrong facts.