Updated to the current spec in docker-compose.yml

[Murdock9803]

Fixes

• Fixes [Bug] The docker-compose.yml file currently out of spec (version is obsolete) #265 by @Murdock9803

Description

Updates to the current spec by removing the version element from docker-compose.yml file.

Technical details

• removed the version element.
• updated the documentation URL to https://docs.docker.com/compose/compose-file/
• https://docs.docker.com/compose/compose-file/04-version-and-name/#version-top-level-element-obsolete

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
• My pull request targets the default branch of the repository (main or master).
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no
  visible errors.

Developer Certificate of Origin

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Developer Certificate of Origin

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[possumbilities]

Fantastic! Approved.