Download MC client jar, run apt-get autorremove

Dockerfile

@@ -8,13 +8,17 @@
 
 FROM debian:jessie
 
+ENV MINECRAFT_VERSION 1.10.2
+
 RUN echo "deb http://overviewer.org/debian ./" >> /etc/apt/sources.list && \
     apt-get update && \
     apt-get install -y wget && \
     wget -O - http://overviewer.org/debian/overviewer.gpg.asc | apt-key add - && \
+    wget https://s3.amazonaws.com/Minecraft.Download/versions/${MINECRAFT_VERSION}/${MINECRAFT_VERSION}.jar -P ~/.minecraft/versions/${MINECRAFT_VERSION}/ && \
     apt-get update && \
     apt-get install -y minecraft-overviewer && \
     apt-get remove -y wget && \
+    apt-get autoremove -y && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* && \
     useradd -m minecraft