update challenge-graphics image, use challenge-base

challenge-graphics/Dockerfile

@@ -1,22 +1,8 @@
-FROM phusion/baseimage
+FROM stepic/challenge-base
 MAINTAINER Pavel Sviderski <[email protected]>
 
 RUN add-apt-repository -y ppa:mc3man/trusty-media && apt-get update \
- && apt-get --no-install-recommends -y install man wget nano screen tmux \
-    imagemagick ffmpeg \
+ && apt-get --no-install-recommends -y install \
+    imagemagick libmagickcore5-extra ffmpeg \
  && apt-get clean \
- && useradd -m box
-
-RUN rm -f /etc/service/sshd/down && /etc/my_init.d/00_regen_ssh_host_keys.sh \
- && rm -rf /etc/service/cron /etc/service/syslog-forwarder /etc/service/syslog-ng
-
-COPY common/ssh /root/.ssh
-COPY common/bashrc /root/.bashrc
-COPY common/bashrc /home/box/.bashrc
-
-COPY common/start.sh /.box/start.sh
-COPY common/greeting /.box/greeting
-
-EXPOSE 22
-
-CMD /.box/start.sh
+ && rm -f /etc/sudoers.d/box