Here are the simple steps needed to create a deployment from your local GIT repository to a server based on this in-depth tutorial.
You are developing in a working-copy on your local machine, lets say on the master branch. Most of the time, people would push code to a remote server like github.com or gitlab.com and pull or export it to a production server. Or you use a service like deepl.io to act upon a Web-Hook that's triggered that service.
But here, we add a "bare" git repository that we create on the production server and publish our branch (f.e. master) directly to that server. This repository acts upon the push event using a 'git-hook' to move the files into a deployment directory on your server. No need for a middle man.