add Log::info('schedule start');

app/Console/Kernel.php

@@ -4,6 +4,7 @@ namespace App\Console;
 
 use Illuminate\Console\Scheduling\Schedule;
 use Illuminate\Foundation\Console\Kernel as ConsoleKernel;
+use Illuminate\Support\Facades\Log;
 
 class Kernel extends ConsoleKernel
 {
@@ -15,6 +16,7 @@ class Kernel extends ConsoleKernel
      */
     protected function schedule(Schedule $schedule)
     {
+        Log::info('schedule start');
         $schedule->command('upgrade:daily')
                  ->dailyAt('00:00')
                  ->emailOutputTo(config("app.email.ScheduleEmailOutputTo"))