Update comments and improve server_test.tsx

[d2verb]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 68.21%. Comparing base (9bb1b08) to head (194245f).

Files with missing lines	Patch %	Lines
src/server.ts	85.71%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #19       +/-   ##
===========================================
+ Coverage   50.00%   68.21%   +18.21%     
===========================================
  Files           4        4               
  Lines         146      151        +5     
  Branches       16       21        +5     
===========================================
+ Hits           73      103       +30     
+ Misses         72       47       -25     
  Partials        1        1               

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