doesn't get latest node version

[Mahn249]

Hello everyone,
My magicmirror is running very well.
Unfortunately, there is a certain module that does not allow the mirror to start when it is called in the config, as it requires Node at least version 14.

In this Dockerfile not the “latest” Node version is pulled, but the “12-buster”.

Is there a specific reason for this?
Unfortunately, I can't manage to update the Node version from 12.22 to version 20.
Can someone help me here?

[Mahn249]

it's about https://github.com/Linas1234/MMM-Regenradar