pre-conf.sh

#!/bin/bash

DEBIAN_FRONTEND=noninteractive apt-get update
DEBIAN_FRONTEND=noninteractive apt-get install -y -q php-gd zoneminder

#to fix error relate to ip address of container apache2
echo "ServerName localhost" | tee /etc/apache2/conf-available/fqdn.conf
ln -s /etc/apache2/conf-available/fqdn.conf /etc/apache2/conf-enabled/fqdn.conf

a2enmod cgi rewrite
a2enconf zoneminder
chown -R www-data:www-data /usr/share/zoneminder/
adduser www-data video

# create backup for /etc/zm  in case -v delete all the data at /etc/zm
mkdir -p /etc/backup_zm_conf
cp -R /etc/zm/* /etc/backup_zm_conf/

#to clear some data before saving this layer ...a docker image
rm -R /var/www/html
rm /etc/apache2/sites-enabled/000-default.conf
apt-get clean
rm -rf /tmp/* /var/tmp/*
rm -rf /var/lib/apt/lists/*