Draft guide for OCI Kubernetes

[n0tl3ss]

• Added guide for OCI Kubernetes
• Small changes to Kubernetes base guide
• Added external-template and common-template, Uses external resources as templates you can provide argument that will be replaced in text.

For an example:

external-template:micronaut-k8s-oci/k8s-microservice.adoc[arg0=api]

will include micronaut-k8s-oci/k8s-microservice.adoc and substitute every appearance of {0} with api.

PDFs:

Using Oracle Cloud Container Engine for Kubernetes (OKE) and the Micronaut Framework.pdf

Kubernetes and the Micronaut Framework.pdf

[sachin-pikle]

Hi @n0tl3ss,

Some feedback:

1. Kubernetes and the Micronaut Framework.pdf: Correct the secret name in the footnote 4 below the auth.yml in section 5.

2. Both the guides: Instead of using "kubectl create -f ...yml", it's better to use "kubectl apply -f ...yml"
   (Recommended by K8s https://kubernetes.io/docs/reference/kubectl/cheatsheet/#kubectl-apply)

3. Kubernetes and the Micronaut Framework.pdf: Works with micronaut-kubernetes version 3.4.1-SNAPSHOT.

4. Another suggestion would be to have a separate k8s namespace to create the resources used in the guide. Cleaning up is as easy as deleting the namespace.