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.

[kmcginnes]

@yrosaguiar unfortunate timing closing this PR. We were just recently discussing bringing this in soon.

Our internal discussion was revolving around using the samples area in the repo for this Kubernetes setup as an example. This alleviates the pressure of ensuring the setup works with every single release, which would increase the test workload for a release.

Do you have any interest in helping with that effort? I know it has been a long time since you opened this PR. If not, we understand. If we decide to proceed with a sample Kubernetes setup we can use this PR as inspiration.