diff --git a/README.md b/README.md
index 261c294..596396a 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,8 @@
-# Welcome to PHP MVC Structure by TanHongIT
+# Welcome to YL MVC Structure by TanHongIT
+
+**YL MVC Structure (PHP MVC)** is a pattern made in PHP used to implement user interfaces, data, and controlling logic. 
+
+It's built based on the combination of ideas from the Yii framework and Laravel framework (yl).
 
 # 1. Configuration requirements
 
@@ -23,11 +27,89 @@ npm run build
 
 # 4. Edit Connect Database
 
-You need to change the connection information to the database after you have cloned my repository so that the website can work.
+You need to change the connection information to the database if you want to store and use data for the website.
+
+Path: [`/config/database.php`](https://github.com/TanHongIT/yl-mvc-structure/tree/main/config)
 
 ```php
 define('DB_HOST', 'localhost');
 define('DB_USER', 'root');
 define('DB_PASS', '');
 define('DB_NAME', 'chatapp-php');
+```
+
+# 5. Install and using ssl certificate
+
+Using **mkcert** to create ssl certificate
+
+### On Ubuntu
+
+```shell
+sudo apt install libnss3-tools
+
+sudo wget https://github.com/FiloSottile/mkcert/releases/download/v1.4.3/mkcert-v1.4.3-linux-amd64 && \
+sudo mv mkcert-v1.4.3-linux-amd64 mkcert && \
+sudo chmod +x mkcert && \
+sudo cp mkcert /usr/local/bin/
+```
+
+Now that the mkcert utility is installed, run the command below to generate and install your local CA:
+
+```shell
+mkcert -install
+```
+
+### Create ssl certificate for this project
+
+Run:
+
+```shell
+cd /var/www/certs
+mkcert local.yl_mvc_structure.com
+```
+
+### Update configuration
+
+Change **local.yl_mvc_structure.com.conf** file (/apache2/sites-available/ to this)
+
+```
+<VirtualHost *:80>
+	ServerAdmin localserver@localhost
+	ServerName local.yl_mvc_structure.com
+	ServerAlias www.yl_mvc_structure.vdx.com
+	DocumentRoot /var/www/yl_mvc_structure
+	ErrorLog /var/www/logs/error-yl_mvc_structure.log
+    CustomLog /var/www/logs/access-yl_mvc_structure.log combined
+</VirtualHost>
+
+<VirtualHost *:443>
+    ServerAdmin localserver@localhost
+    ServerName local.yl_mvc_structure.com
+    ServerAlias www.local.yl_mvc_structure.com
+    DocumentRoot /var/www/yl_mvc_structure
+
+    ErrorLog /var/www/logs/error-yl_mvc_structure.log
+    CustomLog /var/www/logs/access-yl_mvc_structure.log combined
+
+    SSLEngine on
+	SSLCertificateFile /var/www/certs/local.yl_mvc_structure.com.pem
+	SSLCertificateKeyFile /var/www/certs/local.yl_mvc_structure.com-key.pem
+
+    <Directory /var/www/yl_mvc_structure>
+        Options Indexes FollowSymLinks
+        AllowOverride All
+        Require all granted
+    </Directory>
+</VirtualHost>
+```
+
+When done, you can test the website by opening the browser and typing the following URL:
+
+```shell
+https://local.yl_mvc_structure.com
+
+https://local.yl_mvc_structure.com/product
+https://local.yl_mvc_structure.com/product/all
+https://local.yl_mvc_structure.com/product/show/1
+...
 ```
\ No newline at end of file