Clarify what node version is supported in the readme. #1307
Description
The readme says "use (now EOL) v18" but the .nvmrc says 24. It's quite disconcerting for newcomers who have a massive amount of new information to process. Would it be better to change the current readme to just "look at the .nvmrc for the current supported version"?
Edit: I see that https://github.com/overhangio/tutor-mfe/blob/e08b72d9024586a6d0475f6ef49ce182b5a27750/tutormfe/templates/mfe/build/mfe/Dockerfile#L3C1-L3C50 also uses node 20.