Configurable ports for HTTP/1.1 mock server

[azkrishpy]

Issue #, if available:

Description of changes:
Update to change use of default ports as 80 and 443. Make ports configurable from command line.

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

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.60%. Comparing base (e5999fb) to head (a563198).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #535      +/-   ##
==========================================
- Coverage   79.68%   79.60%   -0.09%     
==========================================
  Files          28       28              
  Lines       11865    11866       +1     
==========================================
- Hits         9455     9446       -9     
- Misses       2410     2420      +10     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.