Upgrade to node v22

[technophile-04]

Description:

New node LTS version is v22. Also Vercel by default seems to use that

https://vercel.com/docs/functions/runtimes/node-js/node-js-versions#setting-the-node.js-version-in-project-settings

[rin-st]

Upgrade to Nodejs v22. Let's close the issue when every TODO completed

TODO:

• Se-2
• Create-eth
• Se-2 docs
• Sre challenges
• Sre v2