To run the backend server, you need first cd into the backend directory using cd Backend. Then you need to activate the environment using bash venv/bin/activate on Mac/Linux and bash venv\Scripts\activate on Windows.
Now you need to install your backend dependencies before running your backend server using pip install -r requirements.txt. To save any new dependencies, you can run pip freeze > requirements.txt.
Now you can run your backend server using uvicorn app:app --reload.
Simply cd Frontend and run npm install and npm run dev to run the frontend in development mode.