Create functionality to delete uploaded files from backend and link to frontend

[daku-de]

User story

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As a user, sometimes I would like to delete unwanted files.

Acceptance Criteria

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• In the backend, there should have a function that can delete uploaded files.
• When a user delete a file, the backend should be able to target this file and return a reply if it is successful or error if file does not exist or unable to delete file.

DoD General Criteria

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• Feature has been merged into the main branch
• Feature has been added to the documentation
• Product owner approved features
• Developers agreed to release