Mainly because I wanted an excuse to figure out how to package tools like this using Docker.

It also felt like a better way to distribute the tool for other people to use: I don't want to distribute a compiled binary (because in macOS you then need to sign it for other people to use it), but a Docker incantation skips that step.

Because now I can use their Docker image trivially. They can also trivially use their Docker container on multiple computers, multiple VMs, multiple VPSs. They can Docker Compose it into other Docker images they're setting up, too.

I'm definitely not a Docker expert, but I've become a huge fan.