Updated install docs with guidance about testing minikube

[m3dwards]

I think these docs are clearer on what you have to do. I also got rid of the quickstart document as it's duplicated in the install.md doc.

Fixes: #570

[bdp-DrahtBot]

The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

Conflicts

Reviewers, this pull request conflicts with the following ones:

• #531 (unified HTML landing page (NOT a dashboard!) by willcl-ark)

If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

[josibake]

LGTM, much cleaner! Prompting people to go to docker desktop / minikube docs is excellent. I recently suggested we might need a CONTRIBUTING.md doc in the top level of the repo, which would conflict with your naming here. Perhaps we can call this dependencies.md / installing.md ?

[josibake]

(can also merge now and change the name later if / when we do add a contributing.md)

[m3dwards]

I recently suggested we might need a CONTRIBUTING.md doc in the top level of the repo

I'll just move / rename it, probably would need to be filled out a bit more later too.