Added README file

README.md

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+# Installation
+1. First assign the `$share_url` variable with your onedrive share link. example: `$share_url = "<your share link>";`
+2. Place index.php file inside the DocumentRoot folder of apache or nginx. Make sure php is enabled..
+3. You need to redirect all routes to the index.php file and put the path in a parameter called path.
+    * If you are using apache, you can add following rewrite rules in your virualhost config file:
+        ---
+            RewriteEngine on
+            RewriteRule ^(.*)$ /index.php?path=$1 [PT,L,QSA]
+        ---
+    * If you are using nginx, please search the equivalent configuration on the internet
+        ---
+        ---

index.php

@@ -1,5 +1,5 @@
 <?php
-$share_url = "https://1drv.ms/f/s!AhzmQMxm1n467DZsz0ev8jKEqskE";
+$share_url = "";
 $path = $_GET['path'];
 
 function get_encodedURL($share_url) {