Update README.md

Author: develol

README.md

@@ -1,2 +1,30 @@
 # php-file-explorer-simple
 [PHP] Simple explorer with simple authorization
+
+***PHP v7.2+***
+
+## Getting started
+1. Cloning this repository
+2. Launch **index.php** file for initialization
+3. Update **configuration.php** file
+```php
+<?php
+  $configuration=[
+    "login" => "<value>", // User name for authorization
+    "pwd"   => "<value>", // Password for authorization
+    "title" => "<value>"  // Text in the <title> of the page
+  ];
+?>              
+```
+## Overview of functions
+- Authorization
+  - Creating a file and Upload file
+    - Open in file editor
+    - Open in browser
+    - Deleting a file
+    - Downloading files
+  - Creating a directory
+    - Open in explorer
+    - Open in browser
+    - Deleting a directory
+    - Downloading directory