start the update server and attach to a running fuchsia device
usage: fx serve-updates [-v] [-l host[:port]] [--no-auto-config] -l host:port host and port that "pm serve" will listen on --no-auto-config do not configure this host as a package server on the device -v verbose mode, shows info and debug messages from "pm" -C|--clean clean the package repository first. This flag is only valid if the incremental package publishing is enabled. This command supports incremental package publishing. If enabled, it will auto-publish packages as they are created or modified. To enable incremental package serving, run "fx --enable=incremental serve-updates ..."