Add a way to override the [`docker-compose` template](https://github.com/sourcefuse/terraform-aws-arc-github-runner/blob/main/templates/docker-compose.yml.tftpl) from a downstream resource. Right now, it's only accepting the one defined in this module.
Add a way to override the
docker-composetemplate from a downstream resource. Right now, it's only accepting the one defined in this module.