> Docker is not for production (most of the time), it's a dev tool.

Sure.

>Ignore docker compose

Don't ignore Docker compose. It allows you to set up a test/dev environment with dependencies between containers, shared variables/volumes, etc.

>If you're lucky enough to be developing on Linux, then docker is just a name for a bunch of stuff that's mostly already built into the OS.

We could all just use cgroups to achieve containerization, but why? Docker is a great tool with a huge ecosystem of images at your fingertips, mature and powerful command-line interface, and lots of documentation/googlable discussions for even the most esoteric problems.

But yeah, I wouldn't use it in production.