To create and start a virtual environment, follow these steps in the terminal: 1) Install virtualenv (if it's not installed): pip install virtualenv 2) Create a virtual environment: virtualenv venv 3) Activate the virtual environment: source venv/bin/activate 3) RUN App: npx http-server -p 8080 4) RUN calculator: xpra start :100 --bind-ws=0.0.0.0:14501 --daemon=no --speaker=off --webcam=no --mdns=no --pulseaudio=no --html=on --start-child=gnome-calculator --exit-with-children=yes --notifications=no xpra start :100 --bind-ws=0.0.0.0:14501 --daemon=no --speaker=off --webcam=no --mdns=no --pulseaudio=no --html=on --start-child=libreoffice --exit-with-children=yes gnome-terminal vlc xpra start :100 --bind-ws=0.0.0.0:14501 --html=on --start-child=gnome-calculator --exit-with-children=yes --auth=allow xpra start :100 --start="gnome-calculator" --bind-tcp=0.0.0.0:14500 netstat -tuln | grep 14501 xpra stop :100 npm run dev sudo lsof -i :14500 sudo kill -9 63840 Upgrade Required 5) BUILD App npm run build