feat(worker): adopt canonical public URL

cmd/rsmon-worker/management.go

@@ -35,6 +35,7 @@ func installCommand(args []string) int {
 	fs.StringVar(&opts.Token, "api-key", "", "worker API token (alias for --token)")
 	fs.StringVar(&tokenFile, "token-file", "", "file containing the worker API token")
 	fs.StringVar(&opts.URL, "url", "", "RSMon server URL (RSMON_URL; default https://rsmon.ru)")
+	fs.StringVar(&opts.PublicURL, "public-url", "", "advertised public origin (PUBLIC_URL; scheme + host, no path)")
 	fs.StringVar(&opts.Host, "host", "", "operator console bind address (WORKER_HOST; default 127.0.0.1)")
 	fs.StringVar(&opts.Port, "port", "", "operator console port (WORKER_PORT; required with --name)")
 	fs.StringVar(&opts.Login, "login", "", "operator console login (WORKER_LOGIN; default admin with a generated password)")