code: func installUnixConfigFlags(conf *config.Config, flags *pflag.FlagSet) {
  	conf.Runtimes = make(map[string]types.Runtime)
  
  	flags.StringVarP(&conf.SocketGroup, "group", "G", "docker", "Group for the unix socket")
  	flags.StringVar(&conf.BridgeConfig.IP, "bip", "", "Specify network bridge IP")
  	flags.StringVarP(&conf.BridgeConfig.Iface, "bridge", "b", "", "Attach containers to a network bridge")
  	flags.StringVar(&conf.BridgeConfig.FixedCIDR, "fixed-cidr", "", "IPv4 subnet for fixed IPs")
  	flags.Var(opts.NewIPOpt(&conf.BridgeConfig.DefaultGatewayIPv4, ""), "default-gateway", "Container default gateway IPv4 address")
  	flags.Var(opts.NewIPOpt(&conf.BridgeConfig.DefaultGatewayIPv6, ""), "default-gateway-v6", "Container default gateway IPv6 address")
  	flags.BoolVar(&conf.BridgeConfig.InterContainerCommunication, "icc", true, "Enable inter-container communication")
  	flags.Var(opts.NewIPOpt(&conf.BridgeConfig.DefaultIP, "0.0.0.0"), "ip", "Default IP when binding container ports")
  	flags.Var(opts.NewNamedRuntimeOpt("runtimes", &conf.Runtimes, config.StockRuntimeName), "add-runtime", "Register an additional OCI compatible runtime")
  	flags.StringVar(&conf.DefaultRuntime, "default-runtime", config.StockRuntimeName, "Default OCI runtime for containers")
  
  }
docs: // installUnixConfigFlags adds command-line options to the top-level flag parser for
  // the current process that are common across Unix platforms.