fix: backend ALLOWED_HOSTS parsing

[nimish-ks]

🔍 Overview

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💡 Proposed Changes

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🖼️ Screenshots or Demo

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📝 Release Notes

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❓ Open Questions

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🧪 Testing

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➕ Additional Context

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💚 Did You...

• Ensure linting passes (code style checks)?
• Update dependencies and lockfiles (if required)
• Regenerate graphql schema and types (if required)
• Verify the app builds locally?
• Manually test the changes on different browsers/devices?