Upgrade to node-fetch 3.x

[KristjanESPERANTO]

This is an attempt to tackle issue #2649.

Since node-fetch is converted into an ES module, a simple require statement no longer works.

[codecov-commenter]

Codecov Report

Merging #2750 (348ddf3) into develop (528358f) will increase coverage by 0.35%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #2750      +/-   ##
===========================================
+ Coverage    64.91%   65.26%   +0.35%     
===========================================
  Files            8        8              
  Lines          285      285              
===========================================
+ Hits           185      186       +1     
+ Misses         100       99       -1     

Impacted Files	Coverage Δ
js/server.js	67.56% <0.00%> (+1.35%)	⬆️

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[KristjanESPERANTO]

Since Node 18 will probably get native fetch support, I think that we don't need to continue this topic any further. See #2649