Yes, I see this is a popular request. Will add it soon. For now, compose files are in the infra repo: https://github.com/openworkers/openworkers-infra
Fun fact: I tried K8s early on but found it overkill for my setup, so I stayed on Compose. Will revisit it properly now.
k3s is a good non overkill alternative while benefiting from everything k8s offers.