Bump express to 4.19.2

[michaelnchin]

Issue #, if available: CVE-2024-29041

Description of changes:

• Updating proxy server to Express 4.19.2.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 12.02%. Comparing base (4764466) to head (2f66634).

❗ Current head 2f66634 differs from pull request most recent head ff34da8. Consider uploading reports for the commit ff34da8 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #286   +/-   ##
=======================================
  Coverage   12.02%   12.02%           
=======================================
  Files         410      410           
  Lines       30481    30481           
  Branches      764      764           
=======================================
  Hits         3665     3665           
  Misses      26483    26483           
  Partials      333      333           

Flag	Coverage Δ
unittests	12.02% <ø> (ø)

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