A guide from Linux Capable demonstrates how to set up GitLab on Debian GNU/Linux 11 or 10.
How to Install GitLab on Debian 11 or 10
Learn how to install GitLab on Debian 11 Bullseye or Debian 10 Buster using the command line terminal with this step-by-step guide.
How to Install GitLab on Debian 11 or 10 - LinuxCapable