Update README.md

Enhance README with live preview and badges

Enhance security policy with upgrade and reporting guidelines

Update package.json

Update Next.js and React dependencies

Create SECURITY.md

Update package.json

Update package.json

Update yarn.lock

Update and rename _document.ts to _document.tsx

Update and rename _document.js to _document.ts

Update and rename _document.tsx to _document.js

Update _document.tsx

Update .env

Update .env