Pull Request: Update Server Code for Password Management Extension

[muskan171105]

This pull request updates the server.js file for the Password Management Browser Extension, incorporating the following enhancements:

• Implemented CORS support to allow requests from the browser extension.
• Added a new endpoint to fetch passwords by ID, improving the functionality of the password retrieval process.
• Improved error handling for various routes to ensure better user feedback and system stability.

Changes:

• Modified CORS settings to accept requests from the extension.
• Introduced GET /:id endpoint for retrieving passwords by their ID.
• Enhanced error messages and handling across existing endpoints.

[github-actions]

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[muskan171105]

closes #80