Learn how to set up a basic deployment script to deploy your Drupal 11 website from Gitlab to your server.

https://fonsvandamme.com/insights/deploy-your-drupal-website-gitlab

This is a basic way to deploy your Drupal 11 website, it has always worked for me and I like to keep things simple.

I'm aware that there are more complex methods that don't run composer install on your server. I do like to learn so please share your gitlab-ci.yml file and deploy script if you can improve on this flow to make it more robust.