JAM v0.0.8 needs NPM and node update

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# OK --> the PGP signature of the checked out a958ba6 commit is correct
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npm ERR! code EBADENGINE
npm ERR! engine Unsupported engine
npm ERR! engine Not compatible with your version of node/npm: jam@0.0.8
npm ERR! notsup Not compatible with your version of node/npm: jam@0.0.8
npm ERR! notsup Required: {"node":">=16.11.0","npm":">=8.0.0"}
npm ERR! notsup Actual:   {"npm":"7.24.0","node":"v16.10.0"}

[openoms]

Settled on a more conservative nodeJS update which works with JAM also and has lower risk of breaking anything else.

[rootzoll]

The nodeJS v18 line seems to be the best to switch to and will be active until Oct next year:

https://nodejs.org/en/about/releases/

I will basically create a sd card build with v18 and see if any problems come up.