I can see that this might grow as we think of other tooling required to be productive, so does anyone have any interest in me pushing it ot a repo somewhere, and if so, where would be most suitable?

I think you can push your work in validations-libs.

I will probably push a DockerFile as well.

Those kinds of files are really nice to allow people to hack the framework in a few minutes without getting a very huge and complex deployment.