docker/l3d#146 Replace global drush with vendor location

src/Handler.php

@@ -360,7 +360,7 @@ class Handler extends BaseHandler {
           }
           $crontabs['www-data']['MySQL backup'] = [
             'schedule' => '5 0 * * *',
-            'command' => 'cd /var/www/html && /usr/local/bin/drush sql:dump --result-file=/var/backups/mysql/drupal.sql',
+            'command' => 'cd /var/www/html && /var/www/html/vendor/bin/drush sql:dump --result-file=/var/backups/mysql/drupal.sql',
           ];
           $crontabs['enable'] = TRUE;
           $crontabs['enable_mysql_backup'] = TRUE;