Here are the commands that I thought of:
// copy old yml file to another file and use it to down the services
cp ${dockerComposeYml} ${oldDockerComposeYml} && docker-compose -f ${oldDockerComposeYml} down

//use new yml file to up service
docker-compose build -f ${dockerComposeYml} --force-rm && docker-compose up -d && docker system prune -f

Some questions:

• Do we need to remove the old docker-compose.yml after downing the system?
• how do we conduct a test for the new script?

Best Regards