Update README.md

Update README.md

added CSS and updated readme

added error messages for login/registration and fixed login function

added database script and project info pdf

created user component and implemented update user via put request in frontend

implemented login component

completed register component and updated login route

refactored delete route in the backend and implemented it also in the frontend

renamed server to backend

added role field to User model class and modified associated controller routes

completed home component and added a navbar component

added initial home, signup and login components

fixed register route in backend server and created admin user logged in page

started working on angular frontend