Resolve "add docker build"

Closes #148

This MR adds a Dockerfile to the repository. Before we were deploying in a bind mount, so no dedicated docker image was required. this workflow will break when moving to kubernetes.

so we now create a distinct image for every target environment, including local.

To test this MR checkout the Dockerfile (and all other changed files) and test with docker build and docker run as described in the added section in the readme file.