Hi, I found this thread.. This is explaining how to update your nodejs via npm on centos 7.x. I have not tested this yet I have to find some time. I suggested you try this first in a virtual machine.

I think there is a way to update node.js via npm! I have to try this in a virtual machine so give me some time to try it.

Or use the docker image?

It is an EPEL maintained package. You'd either need to ask them or find a volunteer to maintain it in ClearOS. Asking them is probably easier, but they only released 6.17.1 recently. Or try here from following the download/installation links on node.js but this takes you outside yum (= danger, if you break your system it is up to yuo to fix it).