Feature/validators external endpoint

[aivarasko]

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Changes:

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
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• Refactoring (no functional changes, no api changes)
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Testing

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[codecov-commenter]

Codecov Report

Base: 96.72% // Head: 89.39% // Decreases project coverage by -7.32% ⚠️

Coverage data is based on head (e49858a) compared to base (c834299).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@                     Coverage Diff                      @@
##           feature/enable-prom-http      #13      +/-   ##
============================================================
- Coverage                     96.72%   89.39%   -7.33%     
============================================================
  Files                            11       11              
  Lines                           488      481       -7     
============================================================
- Hits                            472      430      -42     
- Misses                           13       45      +32     
- Partials                          3        6       +3     

Flag	Coverage Δ
integrationtests	?
unittests	89.39% <0.00%> (-7.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/eth2/eth2.go	94.85% <ø> (ø)
pkg/eth2/init.go	49.33% <0.00%> (-43.35%)	⬇️
pkg/eth2/networking/beacon_api.go	94.44% <0.00%> (-1.21%)	⬇️
pkg/eth2/networking/subscribe.go	100.00% <0.00%> (ø)

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