fix code build.js

[teenager-ETH]

Pull Request: Fix Code in build.js

Description

This pull request addresses a bug in the build.js script. Specifically, it replaces the usage of Object.prototype.hasOwnProperty with the modern Object.hasOwn() method for better readability and consistency.

Changes Made:

1. File: client/scripts/build.js
2. Line 153:
   • Before:

     if (Object.prototype.hasOwnProperty.call(err, 'postcssNode')) {

   • After:

     if (Object.hasOwn(err, 'postcssNode')) {

This change ensures modern syntax usage and maintains functionality by checking for the postcssNode property within the error object.

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Why this change?

• The use of Object.hasOwn() is a more modern, concise, and readable alternative to Object.prototype.hasOwnProperty.call().
• Improves code readability and aligns with ECMAScript standards introduced in ES2022.

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Testing

• Verified the change doesn't introduce errors during the build process.
• Tested with various cases to ensure the postcssNode check behaves as expected.

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Checklist

• Code changes are clear and concise.
• The script builds successfully without errors.
• All related functionality has been tested.
• Ready for review.

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Related Issues

• None

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Additional Notes

• Maintainers can edit this PR if needed.
• Feedback and suggestions are welcome.

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Reviewer

Please confirm the following before merging:

1. All CI checks pass.
2. The change is aligned with the project's coding guidelines.

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Thanks for reviewing!