How to use Github to manage dotfiles?

I stored my dotfiles in github, with lots pains, because of no automation. I have to update it myself.

Is there a way that can auto install/update/sync dotfiles? I mean in a fresh server, I download dotfiles and exec a install script to copy dotfiles to local. After some time, I can exec a updateToRemote script to push local changes to remote repo, and on another server, I can exec a updateToLocal script to pull remote changes to local.

Something like that.

The main source of information about dotfiles is dotfiles.github.io.

It references blog posts like Using Git and Github to Manage Your Dotfiles, based on a symlink method.

For starters, we’ll be putting all of our dotfiles into a folder called dotfiles, like so: /home/smalleycreative/dotfiles/vimrc.
Then, we’ll simply symlink to them from our home directory.

Jaime mentions the Atlassian tutorial "The best way to store your dotfiles: A bare Git repository"

The technique consists in storing a Git bare repository in a "side" folder (like $HOME/.cfg or $HOME/.myconfig) using a specially crafted alias so that commands are run against that repository and not the usual .git/ local folder, which would interfere with any other Git repositories around.
(and then the dotfiles folder is managed as a git repo)