Why do I say “non-productive”? Because of the free IBM Cloud Kubernetes Cluster , which will be deleted after 30 days. Surely you can also deploy WordPress for production usage, when you deploy to a paid cluster. But maybe you got a feature code for free IBM Cloud at a conference or at a hackathon and you want play around with IBM Cloud, that could be one option.
You can find the instructions for the deployment here: Scalable WordPress deployment on Kubernetes Cluster. By the way, the project is under Apache 2.0 license.