As others have said, this version was officially released by Ivan, so this isn't code theft. However, it's probably not a good idea to publicly make your server open to the entire community, as I know that back when having self-hosted versions of this server were popular for a hot minute, someone was able to make the servers inoperable by using dev commands.
The Beast continued its studies with renewed Focus, building great Reference works and contemplating new Realities. The Beast brought forth its followers and acolytes to create a renewed smaller form of itself and, through Mischievous means, sent it out across the world.
from The Book of Mozilla, 6:27