Node 16 MFE update

The latest set of MFEs are now using Node 16 - previously this was up to Node 14. This has caused us a fair amount of issues as the Tutor MFE is using node 12 versions of images.

I was going to locally test a node 16 update and wondered if anyone there was working on updating the tutor mfe plugin to now use node 16. Does the Caddy also need updating to the latest?