FLEX-6022: feat - added flex.local.com domain instead of localhost

[rishigupta-3]

Contributing to Twilio

All third-party contributors acknowledge that any contributions they provide will be made under the same open-source license that the open-source project is provided under.

• I acknowledge that all my contributions will be made under the project's license.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.70%. Comparing base (7600927) to head (78084c8).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1137      +/-   ##
==========================================
+ Coverage   89.69%   89.70%   +0.01%     
==========================================
  Files         146      146              
  Lines       14482    14483       +1     
  Branches      983      984       +1     
==========================================
+ Hits        12989    12991       +2     
+ Misses       1472     1471       -1     
  Partials       21       21              

☔ 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.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[shwet2407]

Why are we not using getLocalAndNetworkUrls since its already updated with custom hostname