[DOC] - Add explanation for choosing to deploying Nebari on an "existing" kubernetes cluster

Preliminary Checks

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Summary

Original comment/source

Comment:

I think we need to pick a better catch-all term for this kind of installation, or split it into separate "pre-existing" and "local" installation types. Users with pre-existing k8s infra are probably of a very different type than users who want to trial Nebari with a local install.

This probably means adding an additional how-tos page, at minimum... keeping the current (stub) how-tos/nebari-local.md, and adding a new `how-tos/nebari-k8s.md', say.

Even if they're functionally the same set of instructions (seems unlikely to me? a local install seems likely to be very different from an on-k8s install), the k8s user set is probably going to need a lot less assistance than the local-install user set.

Response:

The local installation is a pre-existing one as well because you need to create the Kubernetes ecosystem using Mikikube and then deploy Nebari inside the virtual node. But I agree that installing on a pre-existing Kubernetes cluster should go to a different how-to as well because it's restricted to what cloud provider or where the cluster is currently hosted/built-in, as well as the security policies already present in the target infrastructure.

Steps to Resolve this Issue

Decide the best way to resolve this - choose better naming conventions, add more details, add separate docs for each types ???

And then do it

Start by reading how-tos/nebari-local.md and the discussion from nebari-docs PR #45. Compare the existing local-install guidance with the needs of users deploying to an existing Kubernetes cluster, then determine whether naming changes, additional detail, or a separate how-tos/nebari-k8s.md page is appropriate. Done means the installation types and their requirements are clearly distinguished.