https://documentation.kopano.io/kopanocore_administrator_manual/installing.html

The part 3.3.3.2 Deb install
maybe an option to add something like

For newer distros like debian stretch and up, ubuntu 18.04.
apt-get install mysql-server or apt-get install mariadb-server
apt-get install apache2-mpm-prefork libapache2-mod-php5 or apt-get install apache2 libapache2-mod-php
Where libapache2-mod-php defaults to libapache2-mod-php7.0

Chap 3.4 SSL, The part:
Creating the directory to hold the certificate files:
mkdir /etc/aache2/certs
chmod 700 /etc/apache2/certs
cd /etc/apache2/certs

mkdir /etc/aache2 should be /etc/apache2