Project: fastify-react
Task (moderate): 1) Render page /profile/:username to display the user profile with UI:
   - h1.profile-username
   - .profile-coin
2) Users can only visit their own profile, and Admins can visit the profiles of all people
3) If the privilege is violated, redirect to the /login page
4) If User not found, shows User not found
5) Create CSS to beautify UI
6) DO NOT use a third-party UI library