docs: improve compose-flags example

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original issue description:

The compose-flags section in the README.md file uses the exact copy of the example from the services section. The usage of compose-flags seems straightforwards, still the example code should reflect the surrounding context.

Original prompt

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This section details on the original issue you should resolve

<issue_title>compose-flags example using services example code</issue_title>
<issue_description>The compose-flags section in the README.md file uses the exact copy of the example from the services section. The usage of compose-flags seems straightforwards, still the example code should reflect the surrounding context.</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #175

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[neilime]

@copilot improve documentation examples to handle issue feedback

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.02%. Comparing base (ab0fa7d) to head (778cbc2).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #176   +/-   ##
=======================================
  Coverage   97.02%   97.02%           
=======================================
  Files           9        9           
  Lines         168      168           
  Branches       22       22           
=======================================
  Hits          163      163           
  Misses          5        5           

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