Update README.md

Author: CrescentKohana

README.md

@@ -2,6 +2,8 @@
 
 This is a custom PHP uploader made for uploading files to your server with ShareX.
 
+Place the upload.php to your webroot (eg. /var/www/example.com/upload.php) and the config.php to anywhere you like (just change the location in upload.php: `$config = include('config.php');`).
+
 Open <b>ShareX</b>, click <b>Destinations</b>, click <b>Destination Settings</b>, scroll down until you find <b>Custom uploaders</b> and add a new uploader with following settings:
  ![ShareX settings](https://i.imgur.com/Ackyu7J.png)