make uri relative

src/imgsort.php

@@ -5,7 +5,7 @@
     // All paths require trailing slashes!
     $rootDir = __DIR__ . '/../images/';
     // The URI at which the rootDir will be served
-    $rootPath = '/images/';
+    $rootPath = 'images/';
     // Path of the directory containing all the files to be sorted, relative to $rootDir
     $stagingDirName = '.sort/';