update books module & create signup via email

refactore dto

adding Env that are used on app

adding Port from .env

Add Validation

Create authDto

clean app.module

protect route with JWT

refactore basic login & authentication

Implement Jwt

adding jwt & google as guards to makesure of naming problems

Installing 3 auth strategies google jwt saml

Enabling cors

create login using google auth

create google oauth strategy