anchor.diff:  
   RUN dpkg --configure -a \
   
  -# setup imagick and python
  +# setup imagick, mariadb, python
       && curl -s -o /tmp/python-support_1.0.15_all.deb https://launchpadlibrarian.net/109052632/python-support_1.0.15_all.deb \
       && dpkg -i /tmp/python-support_1.0.15_all.deb \
  +    && apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xF1656F24C74CD1D8 \
  +    && add-apt-repository 'deb [arch=amd64,i386,ppc64el] http://nyc2.mirrors.digitalocean.com/mariadb/repo/10.1/ubuntu xenial main' \
   
  -# setting up aws-cli and s3cmd
  +# setting up aws-cli, s3cmd, and mongodb tools
       && wget -O- -q http://s3tools.org/repo/deb-all/stable/s3tools.key | apt-key add - \
       && wget -O/etc/apt/sources.list.d/s3tools.list http://s3tools.org/repo/deb-all/stable/s3tools.list \
       && apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 0C49F3730359A14518585931BC711F9BA15703C6 \
  
positive.code:     && mkdir -p /home-bak \
      && rsync -a /home/* /home-bak \
      && mkdir -p /etc/my_init.d \
  
  # vesta session
      && mkdir -p /vesta-start/local/vesta/data/sessions \
  
negative.code: RUN dpkg --configure -a \
      && apt-get update && apt-get -yq upgrade && apt-get install -yf \
      && curl -s -o /tmp/vst-install-ubuntu.sh https://vestacp.com/pub/vst-install-ubuntu.sh \
      && sed -i -e "s/mysql\-/mariadb\-/g" /tmp/vst-install-ubuntu.sh \
      && bash /tmp/vst-install-ubuntu.sh \
      --nginx yes --apache yes --phpfpm no \
      --vsftpd no --proftpd no \
  