Enable running ChatQnA example on Docker Kubernetes

[mkbhanda]

One of OPEA goals is to empower developers to tackle GenAI on their laptops and/or single node settings. The genAI examples run on docker single node instances and for production environments, have been vetted on Kubernetes. Beng able to test on Kubernetes on a single node will make the transition from dev to prod even more smooth. https://docs.docker.com/desktop/kubernetes/