Looking for application flow diagram for understanding the usage.

[vdj69]

What are the uses of the below services and how these services are connected together? It would be very great if you share the high-level architecture and application flow diagram in your free time.

$ npm run start:back $ npm run start:front $ npm run start:biot $ npm run start:worker $ npm run start:thing

And can you share an example to use socket.io/websocket instead of MQTT for connecting the Things with the Server?