update readme file

Author: ecomteck

README.md

@@ -1,3 +1,17 @@
 # Lof All Extension
 
-The extension was included on all landofcoder extensions to generate admin menu 
+The extension was included on all landofcoder extensions to generate admin menu 
+
+## 1. Documentation
+
+## 2. How to install SMTP Extension
+
+### Install via composer (recommend)
+
+Run the following command in Magento 2 root folder:
+
+```
+composer require landofcoder/module-all
+php bin/magento setup:upgrade
+php bin/magento setup:static-content:deploy
+```