As soon as you change your main docker-compose.yml file, because it is versioned controlled:

→ git status
On branch master

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	modified:   docker-compose.yml
                                                                                                                                                                        
→ git pull --rebase
error: cannot pull with rebase: You have unstaged changes.
error: please commit or stash them.

This would prevent a user pulling the latest changes to the joomlatools-server, or contributing via Pull Request without first stashing or removing local changes.

It might be better to version control docker-compose.yml as the generic options, and then make use of a docker compose override file:
https://docs.docker.com/compose/extends/

Therefore as standard the joomlatools-server could ship with:

• docker-compose.yml
• sample-docker-compose-override.yml

Renaming sample-docker-compose-override.yml to docker-compose-override.yml would enable the JT server to pick up these changes during docker compose up.