Allow kapow server to run without .pow file and non-interactive

Co-authored-by: pancho horrillo <pedrofelipe.horrillo@bbva.com>

internal/cmd/server.go

@@ -30,6 +30,7 @@ var ServerCmd = &cobra.Command{
 		go server.StartServer(controlBind, dataBind, userBind)
 
 		// start sub shell + ENV(KAPOW_CONTROL_URL)
+		if len(args) > 0 {
 			powfile := args[0]
 			_, err := os.Stat(powfile)
 			if os.IsNotExist(err) {
@@ -47,6 +48,7 @@ var ServerCmd = &cobra.Command{
 			}
 			fmt.Println()
 			log.Printf("Done running powfile: %q\n", powfile)
+		}
 
 		select {}
 	},