Fix: Add metadataBase to fix the console waring

[nick-y-ito]

Overview

This PR fixes the waring that says "specify metadataBase" in the server console.

Screen Captures

The warning no longer persists.

References

• Next.js - metadataBase

Notes

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• [x] All the related issues are associated with this PR
• [x] All criteria in the associated issues are met (please tick the checkboxes)
• [x] My changes do not generate new warnings or errors (especially in the console)

Reviewer Checklist:

• [ ] Double-check the "Assignee Checklist"
• [ ] The code follows the generic best practices and our Coding Style Guide
• [ ] The code is well-commented and easy to understand
• [ ] The UI changes accurately reflect the provided design

[nick-y-ito]

@kanta1207 @ShoeheyOt @kotaaaa I hope you will review this PR. I think it will take you only 1 min.

[nick-y-ito]

@ShoeheyOt Thank you for your review!