feature/add manifests for k8s installation

[yrosaguiar]

Description of changes:

• Adding manifests for k8s installation support
• Adding deployment, service, namespace
• Adding directory structure for k8s and kustomize
• Adding README for k8s setup

Kubernetes installation

Setup graph-explorer on kubernetes for tests using kustomize

• Resources that will be created:

• Namespace graph-explorer

• Deployment (1 pod replica)

• Service

kubectl apply -k k8s/manifests/overlays/default

Using port-forward to access the graph-explorer

kubectl port-forward svc/graph-explorer 8080:443

• Open the url to access on browser: https://localhost:8080/explorer

Removing all resources:

kubectl delete -k k8s/manifests/overlays/default

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[rochaalexandre]

I have being using it inside the project I'm working and this changed helped a lot making easier to visualize the graph records!

Thank @yrosaguiar

[kmcginnes]

@yrosaguiar Thank you for this great contribution.

We have decided to defer inclusion of this change. We will likely reconsider at a later date.

Anyone who has a need to use Kubernetes with Graph Explorer can follow your wonderful example in this PR.