git@domain already exists in my university network.
However, the Ubuntu 18.04 server that host git@domain is very unstable.
So I wished to set up a Debian server and install with Git.
Can I use hostname other than git to setup Git server?
It is necessary to create git user account for Git server to work?
Because I read many guides[1][2][3], all of them ask to run adduser git command.