Upgrade Container Versions to stable

[rsoika]

Change form latest to stable container versions to avoid breaking the deployment!

version: stable-5765-1

[marner2]

So the reason that the kompose versions are currently at latest is because it's based on the version from the official jitsi docker-compose file, which uses latest.

[prayagsingh]

@rsoika please change imagepullpolicy to ifnotpresent to avoid the extra call to dockerhub.

[rsoika]

I am not sure if the change to a stable version makes sense?

Should we do this or should we stay with the 'latest' version? The point is, that a lot of updates may confuse users when the version changes over night. On the other side the kustomize setup is more a kind of example than a place for productive usage.