This packer recipe creates a GCP Compute image, that runs one or more docker-compose stacks as systemd services.
Create a directory inside files/compose where you put your Docker Compose files. The name of the directory will be used to create a systemd service called docker-compose@<dir_name>.service.
You can add multiple directories, which will result in multiple services.
To build the image, run make PROJECT_ID=$YOUR_PROJECT IMAGE_NAME=$YOUR_IMAGE build. You must be authenticated with gcloud, and have the rights to create compute instances and images in $YOUR_PROJECT.