Change name of the file .env.example to the .env. Check your local address IPv4 using the command
ipconfig - Windows
ifconfig - Linux/MacOS
then copy/paste your local address IPv4 into .env file in REACT_APP_NETWORK_IP_V4.
Finally, you can follow below steps.
In the main directory in the terminal run command npm run dependencies:ci
To run the backend in the terminal run command npm run start:backend.
Backend should listening on the port 8080 and sockets on the port 4444.
To run the webapp application in the terminal run command npm run start:webapp.
Application should listening on the port 3000