Add initial VSCode Remote container support

[hatmarch]

Per #30, adds support for devcontainer for running documentation generation and updates the contributing.md accordingly

Also adds some initial support for running most of the tutorial inside the devcontainer (so that end users don't have to download all the clis and other tools locally)

Some initial work to make the devcontainer work with a locally running minikube (at least when using Docker for Mac)

Also ensures that minikube is setup using the hyperkit driver (instead of the new default docker) as not using hyperkit will cause issues for the rest of the tutorial

[hatmarch]

@kameshsampath Good point. I have made the suggested changes in this commit