Docker Compose Tip #91: Providers now take part in the image phase
A provider managing containers on a remote or non-Docker runtime has always been able to declare build: or image: on its service, but getting the actual image bytes to wherever that runtime lives was left entirely to the provider: push to a registry it can reach, or shell out to docker save/scp and hope it matches what Compose actually resolved. Tip #61 covered provider services for exactly this kind of external dependency: databases, tunnels, Kubernetes intercepts. Compose 5.6.0 adds the piece that tip didn’t have yet: a provider can now opt into the same image phase every other service goes through. ...