build README

Author: Tree

README.md

@@ -1 +1,8 @@
 # https-certification-monitor
+```
+$filename = __DIR__ . '/example/conf.json';
+$scene = new \Tree\Util\Scene\DomainsMonitoring($filename);
+$scene->doMonitorAndRemindByEMail();
+// $scene->doMonitor();  
+echo "done\n";
+```