PORT=5000
MONGO_URI=mongodb://localhost:27017/mern-auth
JWT_SECRET=your_jwt_secret
EMAIL_HOST=smtp.yourhost.com
EMAIL_USER=your_email@example.com
EMAIL_PASS=your_email_password
GOOGLE_CLIENT_ID=your_google_client_id
GOOGLE_CLIENT_SECRET=your_google_client_secret
GOOGLE_CALLBACK_URL=http://localhost:5000/api/auth/google/callback