LAb 4 labapp url for OpenShift flavor

The remote files should also consist of the correct labapp url

{{% remoteFile "https://raw.githubusercontent.com/acend/helm-basic-chart/main/helm-basic-chart/values.yaml" %}}

we currently include the remote file, which contains .labapp.acend.ch but on openshift it should `training.openshift.ch`

And the port should be 8080 instead of 80