Feat: Add a voilet bg on sign in page to look attractive

[theashikagupta]

Describe the feature

I want to add a attractive background on sign in page.

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[github-actions]

Congratulations, @theashikagupta! 🎉 Thank you for creating your issue. Your contribution is greatly appreciated and we look forward to working with you to resolve the issue. Keep up the great work!

We will promptly review your changes and offer feedback. Keep up the excellent work! Kindly remember to check our contributing guidelines