Run locally wiith minikube & remove docker-compose

[ThomasThelen]

Now that we have a helm chart, we should be able to run slinky locally with minikube. I tried this out but ran into issues when it came to Virtuoso (non-configurable csi volume & no PV definition). It would be great to be able to run through minikube; this would let us stick to using kubernetes commands in the docs (we're currently a mix of k8 and docker) and remove the docker-compose files from the project.