Updated to fix Nginx Proxy Manager Issue

There is an issue where the database has permission issue in the /var/lib/mysql folder items. It is fixed by changing the data folder of mariadb container in docker-compose

nginxproxymanager-tutorial/README.md

@@ -93,7 +93,7 @@ services:
       MYSQL_USER: 'npm'
       MYSQL_PASSWORD: 'npm'
     volumes:
-      - ./data/mysql:/var/lib/mysql
+      - ./mysql:/var/lib/mysql
 ```
 
 ### 2.2. Start the Nginx Proxy Manager