teach people how to set kubeconfig and path

[MHBauer]

is was a huge problem in actual practice. We need to add the details on how to do this on linux and windows.

export KUBECONFIG=bleh
&
$env:KUBECONFIG = bleh
something like that anyway, I don't have windows to test.

[timroster]

Yes, we saw this too in a workshop. On windows when using cmd or powershell, the ibmcloud cs cluster-config <clustername> command returns something like:
set KUBECONFIG=bleh
regardless of the shell being used. Copy/paste of this to cmd works, but for powershell this needs to be changed to:
$env:KUBECONFIG=bleh
for kubectl to access the IKS cluster.

[remkohdev]

expired, please recreate issue if this still exists in the current version