Add customizations to devcontainers

[daniel-mizsak]

• Linting passes
• Tests are added and passing
• Documentation is updated

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (6247a0e) to head (b3e0bdb).
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #37   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines           36        36           
=========================================
  Hits            36        36           

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