Function my_iot::spawn_service

fn spawn_service(
    service_id: String, 
    service: Box<dyn Service>, 
    db: ArcMutex<Db>, 
    tx: Sender<Reading>
) -> JoinHandle<()>

Spawn service thread.

• service_id: user-defined service ID.
• service: service instance.
• db: main database.
• tx: readings sender.
• status: struct to keep track of the service status.