fix: Disable nodeEnv optimization in Webpack

[FrederikBolding]

Disable the nodeEnv optimization in the default Webpack config, this optimization would simply add the NODE_ENV environment variable set to production, but that is unnecessary since we are already defining NODE_ENV ourselves.

This prevents an issue where devs would run into warnings when attempting to set NODE_ENV themselves.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.71%. Comparing base (8b2bada) to head (1c29e56).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2970   +/-   ##
=======================================
  Coverage   94.71%   94.71%           
=======================================
  Files         497      497           
  Lines       10802    10802           
  Branches     1649     1649           
=======================================
  Hits        10231    10231           
  Misses        571      571           

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