How to run postgresql with podman : 

https://github.com/a4ambrish/king-of-kubernetes/wiki/containerized%E2%80%90postgres 

https://www.redhat.com/en/services/certification/rhcs-openshift-application-development

https://www.redhat.com/en/services/certification/red-hat-certified-enterprise-microservices-developer

Red Hat Certified Enterprise Microservices Developer

https://www.redhat.com/en/services/training/ex183-red-hat-certified-enterprise-application-developer-exam

Red Hat Certified OpenShift Application Developer

https://www.redhat.com/en/services/training/ex288-red-hat-certified-openshift-application-developer-exam

Red Hat Certified Specialist in Containers

https://www.redhat.com/en/services/training/ex188-red-hat-certified-specialist-containers-exam

Red Hat Certified Cloud-Native Developer 

Red Hat Certified Cloud-Native Developer exam (EX378)

https://www.redhat.com/en/blog/remote-debugging-java-applications-openshift