some help update and a pet update

[CPernet]

• As I was re-reading the doc - from home on windows - I needed to update my node.js and some info was missing so I added it.
• I updated the pet spec with this pull request and so pushed the validator counterpart here

[codecov]

Codecov Report

Merging #1302 (4d34bfd) into master (da684b2) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1302   +/-   ##
=======================================
  Coverage   82.51%   82.51%           
=======================================
  Files          78       78           
  Lines        2723     2723           
  Branches      612      612           
=======================================
  Hits         2247     2247           
  Misses        385      385           
  Partials       91       91           

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