Disclaimer: This is for knowledge sharing purposes, review licensing matters here
I have pushed the image mentioned in my public repo for your convenience.
Follow this simple steps:
kubectl create deployment orcl --image=docker.io/javiermugueta/orcl ... kubectl expose deployment orcl --type=LoadBalancer --port=1521 ... kubectl get services
Take a look to the public IP created (with kubectl get services) and connect with SqlDeveloper as follows:
Enjoy 😉
approaching off the bow 