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: up.go
    path of file: ./repos/td/tgtest/cluster
    
    the code of the file until where you have to start completion: package cluster

import (
	"context"
	"fmt"
	"net"
	"net/http"
	"net/url"
	"time"

	"github.com/go-faster/errors"

	"github.com/gotd/td/tdsync"
	"github.com/gotd/td/tg"
	"github.com/gotd/td/transport"
)

// Up runs all servers in a cluster.
func (c *Cluster) Up(ctx context.Context) error {
	g := tdsync.NewCancellableGroup(ctx)

	listen := func(ctx context.Context, _ int) (net.Listener, error) {
		return newLocalListener(ctx)
	}
	if c.web {
		// Create local random listener
		l, err := newLocalListener(ctx)
		if err != nil {
			return err
		}

		mux := http.NewServeMux()
		srv := http.Server{
			ReadHeaderTimeout: time.Second * 10,
			Handler:           mux,
			BaseContext: func(net.Listener) context.Context {
				return ctx
			},
		}
		g.Go(func(ctx context.Context) error {
			if err := srv.Serve(l); err != nil && !errors.Is(err, http.ErrServerClosed) {
				return errors.Wrap(err, "serve")
			}
			return nil
		})
		g.Go(func(ctx context.Context) error {
			<-ctx.Do
    
func (c *Cluster) Up(ctx context.Context) error {
	g := tdsync.NewCancellableGroup(ctx)

	listen := func(ctx context.Context, _ int) (net.Listener, error) {
		return newLocalListener(ctx)
	}
	if c.web {
		// Create local random listener
		l, err := newLocalListener(ctx)
		if err != nil {
			return err
		}

		mux := http.NewServeMux()
		srv := http.Server{
			ReadHeaderTimeout: time.Second * 10,
			Handler:           mux,
			BaseContext: func(net.Listener) context.Context {
				return ctx
			},
		}
		g.Go(func(ctx context.Context) error {
			if err := srv.Serve(l); err != nil && !errors.Is(err, http.ErrServerClosed) {
				return errors.Wrap(err, "serve")
			}
			return nil
		})
		g.Go(func(ctx context.Context) error {
			<-ctx.Done()

			return srv.Close()
		})

		baseURL := url.URL{
			Scheme: "http",
			Host:   l.Addr().String(),
		}
		listen = func(ctx context.Context, dc int) (net.Listener, error) {
			listener, handler := transport.WebsocketListener(l.Addr())

			path := fmt.Sprintf("/dc/%d", dc)
			mux.Handle(path, handler)

			dcURL := baseURL
			dcURL.Path = path
			c.domains[dc] = dcURL.String()
			return listener, nil
		}
	}

	for dcID, s := range c.setups {
		l, err := listen(ctx, dcID)
		if err != nil {
			return errors.Wrapf(err, "DC %d: listen port", dcID)
		}

		if !c.web {
			// Add TCP listeners to config.
			if addr, ok := l.Addr().(*net.TCPAddr); ok {
				c.cfg.DCOptions = append(c.cfg.DCOptions, tg.DCOption{
					Ipv6:      addr.IP.To16() != nil,
					Static:    true,
					ID:        dcID,
					IPAddress: addr.IP.String(),
					Port:      addr.Port,
				})
			}
		}

		// Copy iteration value.
		srv := s.srv
		g.Go(func(ctx context.Context) error {
			return srv.Serve(ctx, transport.ListenCodec(nil, l))
		})
	}
	c.ready.Signal()

	return g.Wait()
}