If all you're doing on your server is git, then the first two points you make are covered basic apt-get usage. It's super easy. point 3 isn't that necessary if

If all you're doing on your server is git, then the first two points you make are covered basic apt-get usage. It's super easy. point 3 isn't that necessary if all you're doing is git over ssh. All the people that have a checked out copy have a backup of your repo. Also, if you're only doing git over ssh then it's not hard to make the box relatively secure. ssh will be hte only open port, and it won't be on the standard port.