add some changes to run the application

Lib/AppMigrator.php

@@ -12,6 +12,10 @@ class AppMigrator {
   private $env_class;
   private $db_class;
   private $migrator_class;
+  private $conn;
+  private $db_name;
+  private $uname;
+  private $passwd;
 
   public function __construct() {
     $this->env_class = Dependency::get_dependency(IEnvironment::class);