150 points for adding Landing Page and Spotify Auth

[pranshu05]

Add a landing page and enable Spotify Auth to allow onboarding users to log-in without any hassle. According to their username, the Now Playing page should be unique and sharable, allowing users to share their Spotify Activity with other users(globally). This feature requires a DB, you can use MongoDB if possible.

For example: let a user has Spotify username awgtjjqdxae0pw5as3bcadxcd: , then the structure should be:
protify.vercel.app --> Landing page
protify.vercel.app/user/xyz --> User's page (Sharable)