Get a SECRET_KEY from https://djecrety.ir/ , and put it inside SECRET_KEY variable settings.py in backend folder.
install react in frontend folder with this command : npm install react
As for backend side, the venv folder is already inside the project folder and it has all modules installed, so when you want to run the webserver be sure to activate virtual-env,by doing the following: path/to/project_folder/backend venv\Scripts\activate to activate the virtual env
(OPTIONAL) Remember to create an admin account in Django, following this steps:
in terminal/cmd:
path/to/folder python manage.py createsuperuser
Run the webserver (backend) : path/to/folder python manage.py runserver
then start react app (frontend): path/to/folder/main npm start