Structure of repositories for fast delivery to combat vehicles?

Question

git

The test server has the following (non-final) application structure:

• common_files
  
• app1
  
• app2
  
• app3
  

Each app has the same codebase, some templates and statics, only 10 template files and a couple of static files differ. In each of these directories there are symlinks to files from common_files.
Each app must be delivered to its specific battle server.

But how to organize repositories so that each of them contains common_files and a specific app? Or is it better to make separate branches for each app?
Or maybe it's worth reorganizing the file structure? Any advice and ideas are welcome.

Answer 1

appX in separate repacks.
common_files is also in a separate file and tied to the rest using submodule/subtree.

Answer 2

Do not use symlinks Separate
general into a separate app
Use import
Use pip install