I struggled with a minimal example that bootstraps a WebSocket connection between a React client and a Flask backend.

Running the backend

Only required for the first time

cd backend
python3 -m venv venv
. venv/bin/activate
pip3 install -r requirements.txt

Run the server

./launch-server.sh

Running the frontend

Only required for the first time

cd frontend
npm install

Run the client

npm start