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