Function my_iot::spawn_services

fn spawn_services(
    settings: &Settings, 
    db: &Arc<Mutex<Db>>, 
    tx: &Sender<Message>
) -> Result<Vec<Sender<Message>>, Error>

Spawn all configured services.

Returns a vector of all service input message channels.

• tx: output message channel that's used by services to send their messages to.