Yeah, the author's main argument seems to be you can only run one process in a Docker container, which is utterly false. It's fair to say it's idiomatic to run

Yeah, the author's main argument seems to be you can only run one process in a Docker container, which is utterly false. It's fair to say it's idiomatic to run one process per container, but it's definitely not the only way and it's common to find multi-process containers.