Merge pull request #157 from linuxserver/libxdamage

libxdamage added and standardise docker mod config

root/etc/cont-init.d/95-apt-get

@@ -0,0 +1,3 @@
+#!/usr/bin/with-contenv bash
+
+apt-get update

root/etc/cont-init.d/98-calibre

@@ -5,5 +5,10 @@ if [ ! -e /usr/bin/calibre-server ]; then
 fi
 
 if [ ! -L /usr/lib/x86_64-linux-gnu/libGL.so.1 ]; then
-  apt update && apt install -y libgl1-mesa-glx
+  apt-get install -y libgl1-mesa-glx
 fi
+
+if [ ! -L /usr/lib/x86_64-linux-gnu/libxdamage.so.1 ]; then
+  apt-get install -y libxdamage1
+fi
+