[Installer] Request for MySQL database server support

[Edi Septriyanto]

Describe the Issue / Bug

This is not a bug, but a new feature request for MySQL database server support on LEMPer Stack.

Official APT repository: https://dev.mysql.com/downloads/repo/apt/

Installation reference for Debian & Ubuntu
https://dev.mysql.com/doc/mysql-apt-repo-quick-guide/en/#apt-repo-fresh-install

wget https://dev.mysql.com/get/mysql-apt-config_0.8.19-1_all.deb

sudo dpkg -i mysql-apt-config_0.8.19-1_all.deb

sudo apt-get update

sudo apt-get install mysql-server mysql-client

#To install the shared client libraries:
sudo apt-get install libmysqlclient21