I meant it as in having a CI system that relies on Docker or whatever container image system. You submit a build via some config files, the build farm builds the image and extracts the built binaries into a repo/binhost/S3, and you get your binary from there. Or you can now use that image for another build, in a pipeline.

There’s zillions of options for doing this nowadays, many of them self-hostable, which is pretty cool.