Pass coverage flag to worker process

[MichaelHatherly]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 81.81818% with 2 lines in your changes missing coverage. Please review.

Project coverage is 66.12%. Comparing base (765f39c) to head (1ffa579).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/server.jl	81.81%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #284       +/-   ##
===========================================
+ Coverage   35.28%   66.12%   +30.83%     
===========================================
  Files          57       58        +1     
  Lines        2814     2816        +2     
===========================================
+ Hits          993     1862      +869     
+ Misses       1821      954      -867     

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