Create Docker image from build output

[johnament]

Question/Issue Overview

Implement a docker container from the build using a gradle plugin that can generate docker containers

https://github.com/bmuschko/gradle-docker-plugin for instance is a plugin that can do this, without a Dockerfile

Current Behavior

While we have a Dockerfile checked in with docker compose, it requires mysql. For smaller use cases it would be useful to have a base image that didn't require an external database.