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 😉

IT