chore: add Docker-based Prettier integration

[IamLRBA]

Fixes

• Fixes [Feature] enable Prettier to run automatically #520 by @dijitali

Description

This approach ensures consistent code formatting across environments without requiring contributors to install Prettier or Husky locally. The changes made are;

• Added docker/run-prettier.sh to check code formatting inside a Node container
• Added optional docker/format-prettier.sh script to automatically format the code
• Introduced .prettierrc and .prettierignore to configure and exclude paths
• Updated README.md with instructions for running Prettier via Docker

Technical details

This avoids inconsistencies in formatting between contributors' IDEs and enforces a standard style without requiring Node-based tools like Husky or lint-staged, which are not part of this Python-based project.

Tests

• Run Prettier Check
  ./docker/run-prettier.sh

• Auto-Format
  ./docker/format-prettier.sh

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

For the purposes of this DCO, "license" is equivalent to "license or public domain dedication," and "open source license" is equivalent to "open content license or public domain dedication."

Developer Certificate of Origin

Developer Certificate of Origin
Version 1.1

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Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.


Developer's Certificate of Origin 1.1

By making a contribution to this project, I certify that:

(a) The contribution was created in whole or in part by me and I
    have the right to submit it under the open source license
    indicated in the file; or

(b) The contribution is based upon previous work that, to the best
    of my knowledge, is covered under an appropriate open source
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[possumbilities]

@IamLRBA Hi! I think we would want the implementation to better match what is happening in the Search Portal repository. So that the prettier + docker setups are all the same across repositories.

That's also mentioned in the original Issue as well in this comment:

• [Feature] enable Prettier to run automatically #520 (comment)

[possumbilities]

This was resolved by:

• Chore/add dockerised prettier #580

Closing