Nginx as reverse proxy in Openshift Cluster

Hi,

I am new to Nginx and I could validate some of the reverse proxy scenarios in Windows and Ubuntu machine successfully. However I am facing challenges on validating them on Openshift cluster platform.

I am new to Docker/Kubernetes/Openshift. I am able to deploy the below Nginx image in Openshift and hit the welcome page url successfully.

"https://github.com/sclorg/nginx-ex"

Now I want to achieve the below things on the image.

1) Want to know what is the nginx version deployed on the above image.
2) Want to customize the nginx.conf file frequently and update my container with the latest changes.
3) Want to use the latest version of nginx.
4) Want to know how to locate the nginx.conf file and other nginx files deployed through the above image.
5) When I open a POD terminal, I can see Nginx 1.12 files are deployed in /etc/nginx, can I upgrade this to latest version? are these files created by the deployment of the above image?

Please clarify & help me on the above queries.