feat: add helmet middleware in server example

[amlel-el-mahrouss]

Related PR #230

[cppalliance-bot]

An automated preview of the documentation is available at https://141.beast2.prtest3.cppalliance.org/index.html

If more commits are pushed to the pull request, the docs will rebuild at the same URL.

2025-12-24 17:12:16 UTC

[cppalliance-bot]

GCOVR code coverage report https://141.beast2.prtest3.cppalliance.org/gcovr/index.html
LCOV code coverage report https://141.beast2.prtest3.cppalliance.org/genhtml/index.html
Coverage Diff https://141.beast2.prtest3.cppalliance.org/gcovr/coverage_diff.txt

Build time: 2025-12-24 17:13:05 UTC

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 48.69%. Comparing base (b95d418) to head (18b1884).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #141   +/-   ##
========================================
  Coverage    48.69%   48.69%           
========================================
  Files           36       36           
  Lines         1419     1419           
========================================
  Hits           691      691           
  Misses         728      728           

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