How to install RoundCube with Postfix, Dovecot, NGINX, MariaDB (or MySQL) on Ubuuntu-20.04

Environment
Device: Odroid-HC2
Operating system: Ubuntu-20.04
HOST: 192.168.101.100
Pre-installed application: MariaDB (or MySQL), NGINX, PHP, POSTFIX, DOVECOT

https://yiworkdisk.netlify.app/en/linux/install_roundcube.html

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