I'm going to answer my own question.
I have found the NodeBB Featured Threads plugin.
With this one I can stack the posts I like to show.
I am running a nodebb for several months now and it was always managed by pm2 to be sure that it was started up if/when I had to reboot the server. Since the 0.5.5 when nodebb when managed by pm2 the page layout breaks however running it as standalone it works fine.
Can anyone give me a suggestion?
My guess, and only a guess, is that it has to do with the clustered support already integrated in the newer versions of NBB. I would disable pm2 and run it using the standard
./nodebb start command for now. I don't think pm2 is fully supported by NBB as of yet, but don't quote me on that.
As I mentioned earlier it was working just fine until 0.5.5