Configurable Live Data Server domain name

[backmari]

Short description of the changes:

Allow the user to override the Live Data Server domain name and port using environment variables. This is to be able to test the new RHEL9 Live Data Server under its temporary domain name.

Check list for the pull request

• I have read the [CONTRIBUTING]
• I have read the [CODE_OF_CONDUCT]
• I have added tests for my changes
• I have updated the documentation accordingly

Check list for the reviewer

• I have read the [CONTRIBUTING]
• I have verified the proposed changes
• best software practices
  • all internal functions have an underbar, as is python standard
  • clearly named variables (better to be verbose in variable names)
  • code comments explaining the intent of code blocks
• All the tests are passing
• The documentation is up to date
• code comments added when explaining intent

Manual test for the reviewer

References

Story 4767: [LiveDataServer] Deploy containerized Live Data Server and test with WebMon test environment
Task 4885: Fix hardcoded "livedata.sns.gov" in WebMon

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.21%. Comparing base (44604d5) to head (ba9d8be).

Additional details and impacted files

@@            Coverage Diff             @@
##             next     #162      +/-   ##
==========================================
+ Coverage   77.16%   77.21%   +0.04%     
==========================================
  Files          50       50              
  Lines        4634     4634              
==========================================
+ Hits         3576     3578       +2     
+ Misses       1058     1056       -2     

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[jmborr]

looks 👌