You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: hello_signaling.rs
    path of file: ./repos/matchbox/bevy_matchbox/examples
    
    the code of the file until where you have to start completion: //! Runs a signaling server with server/client topology as a headless bevy
//! application.

use bevy::{app::ScheduleRunnerPlugin, log::LogPlugin, prelude::*, utils::Duration};
use bevy_matchbox::{matchbox_signaling::SignalingServer, prelude::*};
use std::net::{Ipv4Addr, SocketAddrV4};

fn main() {
    App::new()
        .add_plugins((
            MinimalPlu
    
fn start_signaling_server(mut commands: Commands) {
    info!("Starting signaling server");
    let addr = SocketAddrV4::new(Ipv4Addr::UNSPECIFIED, 3536);
    let signaling_server = MatchboxServer::from(
        SignalingServer::client_server_builder(addr)
            .on_connection_request(|connection| {
                info!("Connecting: {connection:?}");
                Ok(true) // Allow all connections
            })
            .on_id_assignment(|(socket, id)| info!("{socket} received {id}"))
            .on_host_connected(|id| info!("Host joined: {id}"))
            .on_host_disconnected(|id| info!("Host left: {id}"))
            .on_client_connected(|id| info!("Client joined: {id}"))
            .on_client_disconnected(|id| info!("Client left: {id}"))
            .cors()
            .trace()
            .build(),
    );
    commands.insert_resource(signaling_server);
}