update onboarding docs

[Coiling-Dragon]

Signed-off-by: Stanislav Viyachev stanislav.viyachev@limechain.tech

Detailed description:

Which issue(s) this PR fixes: Fixes #752

Special notes for your reviewer:

Checklist

• [x] Documentation added
• [ ] Tests updated

[codecov[bot]]

Codecov Report

Merging #791 (477a974) into main (965f96b) will not change coverage. The diff coverage is n/a.

:exclamation: Current head 477a974 differs from pull request most recent head f597e62. Consider uploading reports for the commit f597e62 to get more accurate results

@@           Coverage Diff           @@
##             main     #791   +/-   ##
=======================================
  Coverage   61.53%   61.53%           
=======================================
  Files          81       81           
  Lines        6092     6092           
=======================================
  Hits         3749     3749           
  Misses       2163     2163           
  Partials      180      180           

Flag	Coverage Δ
unittests	61.53% <ø> (ø)

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[rokn]

Nice work!