fix: Sync Dockerfiles and templates

images/email/Dockerfile

   apt-get -y install --no-install-recommends \
   rsyslog \
   postfix postfix-pcre postfix-ldap \
-  sudo cron getmail4 \
+  cron getmail4 \
   mutt swaks \
   dovecot-core dovecot-imapd dovecot-pop3d dovecot-lmtpd dovecot-ldap \
   libsasl2-2 sasl2-bin libsasl2-modules-ldap

images/haproxy/Dockerfile

 FROM debian:buster
 
+#RUN echo deb http://deb.debian.org/debian jessie-backports main  >> /etc/apt/sources.list
+#RUN apt-get update && apt-get install -y haproxy cron \
+#    && apt-get install -y certbot -t jessie-backports
+
 RUN apt-get update && apt-get install -y haproxy cron certbot
 
 RUN mkdir -p /run/haproxy

images/mariadb/Dockerfile.template

   apt-get -y install mariadb-server procps
 
 RUN  find /etc/mysql/ -name *.cnf -exec sed -i 's/^\(bind-address\s.*\)/# \1/' {} \;
-
-# Install Mysql DB
-RUN mysql_install_db --user=mysql --ldata=/var/lib/mysql
+#RUN \
+#  find /etc/mysql/ -name *.cnf -exec sed -i 's/^\(bind-address\s.*\)/# \1/' {} \; && \
+#  echo "mysqld_safe &" > /tmp/config && \
+#  echo "mysqladmin --silent --wait=30 ping || exit 1" >> /tmp/config && \
+#  echo "mysql -e 'GRANT ALL PRIVILEGES ON *.* TO \"root\"@\"%\" WITH GRANT OPTION;'" >> /tmp/config && \
+#  bash /tmp/config && \
+#  mysql -e "SELECT Host, User, Password FROM mysql.user;" > /tmp/a.out
+  #rm -f /tmp/config
 
 COPY tuning.cnf /etc/mysql/conf.d/tuning.cnf
 

images/nextcloud/Dockerfile.template

     cat /tmp/php_nc.ini >> /etc/php/7.4/cli/php.ini
 # https://docs.nextcloud.com/server/13/admin_manual/installation/source_installation.html#php-fpm-tips-label
 RUN sed -i 's/^;env/env/g' /etc/php/7.4/fpm/pool.d/www.conf
+# https://github.com/nextcloud/vm/issues/2039#issuecomment-876204446
+RUN echo "" >> /etc/php/7.4/mods-available/apcu.ini
+RUN echo "apc.enable_cli=1" >> /etc/php/7.4/mods-available/apcu.ini
 
 # Create the data-directory where NEXTCLOUD can store its stuff
 RUN mkdir -p "${NEXTCLOUD_DATA_PATH}" && \