Make Sure to Create a config.ev file in backend/config directory and add appropriate variable in order to use the app.
Essential Variables
JWT_SECRET = JWT_EXPIRES_IN = CLOUDINARY_NAME = CLOUDINARY_API_KEY = CLOUDINARY_API_SECRET = SMPT_SERVICE = SMPT_MAIL = SMPT_PASSWORD = SMPT_HOST = SMPT_PORT = FRONTEND_URL = MONGODB_URL0 = GOOGLE_CLIENT_ID = GOOGLE_CLIENT_SECRET = GOOGLE_CALLLBACK_URL =
file each filed with your info respectivley
Priyanshu Uttam