Is it possible to use gitlab on LAN?

Question

GitLab

Good day to all!
In general terms, I will describe the essence of the problem.
There is an application and a customer who wants the application to work only on the local network without access to the Internet.
I've already had the bad experience of working in the same mode, where the only way to deliver the code to the client server is to send it over ssh via vpn. Don't ask me why, it was a decision from above.
In this situation, I would like to solve the problem using Gitlab, but I don’t know if such a scheme will work:
on one machine with access to the Internet and to the customer’s local network, gitlab is launched, and on the second, the gitlab runner and the application itself are launched via CI / CD, but at 2 machines all accesses to the Internet are cut off.
Will such a scheme work and what other protection nuances need to be performed?

Answer 1

Build an installation package in which you put all the necessary dependencies and, most importantly, the update code for each previous version (usually they run a series of update scripts for the entire release history in sequence, if the process is more complicated than just copying files).
I have no idea how you are going to set up the gitlab repository, and most importantly, why.