docker: Using phusion/baseimage instead ubuntu like base image

Read about reasons in https://registry.hub.docker.com/u/phusion/baseimage/

Dockerfile

@@ -2,18 +2,25 @@
 #
 # VERSION       0.2
 # DOCKER-VERSION        0.4
-FROM    ubuntu:trusty
+FROM    phusion/baseimage
 MAINTAINER Ernesto Rodriguez Ortiz <ernesto.rodriguezortiz@savoirfairelinux.com>
 
+# Set correct environment variables.
+ENV HOME /root
+
+# Regenerate SSH host keys. baseimage-docker does not contain any, so you
+# have to do that yourself. You may also comment out this instruction; the
+# init system will auto-generate one during boot.
+RUN /etc/my_init.d/00_regen_ssh_host_keys.sh
+
+# Use baseimage-docker's init system.
+CMD ["/sbin/my_init"]
+
 # Update software source
 RUN apt-get update
 
-RUN dpkg-divert --local --rename --add /sbin/initctl
-RUN ln -sf /bin/true /sbin/initctl
-
 # Install Apache, MySQL, PHP, and others..
 RUN DEBIAN_FRONTEND=noninteractive apt-get -y install vim curl wget git mysql-client mysql-server apache2 libapache2-mod-php5 pwgen python-setuptools vim-tiny php5-mysql php-apc php5-gd php5-curl php5-memcache memcached mc php-pear postfix php5-imagick php5-dev build-essential
-RUN DEBIAN_FRONTEND=noninteractive apt-get autoclean
 
 # Install drush, phpmd, phpcpd, site_audit, uploadprogress
 RUN pear channel-discover pear.drush.org && pear install drush/drush 
@@ -27,7 +34,20 @@ RUN ln -s /etc/php5/mods-available/uploadprogress.ini /etc/php5/apache2/conf.d/2
 # Make mysql listen on the outside
 RUN sed -i "s/^bind-address/#bind-address/" /etc/mysql/my.cnf
 
-COPY start-servers /usr/local/bin/
-WORKDIR /var/www/html
+# Adding additional memcached daemon
+RUN mkdir /etc/service/memcached
+ADD service/memcached.sh /etc/service/memcached/run
+
+# Adding additional mysqld daemon
+RUN mkdir /etc/service/apache2
+ADD service/apache2.sh /etc/service/apache2/run
+
+# Adding additional apache2 daemon
+RUN mkdir /etc/service/mysqld
+ADD service/mysqld.sh /etc/service/mysqld/run
+
+# Expose port 80 for apache connection on the aoutside
 EXPOSE 80
-CMD ["start-servers"]
+
+# Clean up APT when done.
+RUN DEBIAN_FRONTEND=noninteractive apt-get autoclean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

start-servers → service/apache2.sh

 #!/bin/bash
 set -e
-# Start nysql server
-/usr/bin/mysqld_safe &
 # Apache gets grumpy about PID files pre-existing
 rm -f /var/run/apache2/apache2.pid
 source /etc/apache2/envvars

service/memcached.sh

+#!/bin/sh
+exec /sbin/setuser memcache /usr/bin/memcached
+ 

service/mysqld.sh

+#!/bin/sh
+exec /sbin/setuser mysql /usr/bin/mysqld_safe