Add staticcheck to CI flow

[aldas]

Add staticcheck to CI flow

[codecov]

Codecov Report

Base: 92.38% // Head: 92.38% // No change to project coverage 👍

Coverage data is based on head (d465343) compared to base (3c4d3b3).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2343   +/-   ##
=======================================
  Coverage   92.38%   92.38%           
=======================================
  Files          37       37           
  Lines        4454     4454           
=======================================
  Hits         4115     4115           
  Misses        247      247           
  Partials       92       92           

Impacted Files	Coverage Δ
middleware/jwt.go	92.98% <100.00%> (ø)

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