Standardized apt-get update per aptalca

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

@@ -0,0 +1,5 @@
+#!/usr/bin/with-contenv bash
+
+if [ -f /usr/bin/apt ]; then
+    apt-get update
+fi

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

@@ -18,7 +18,6 @@ if [ ! -f /usr/bin/mkvmerge ]; then
   if [ -f /usr/bin/apt ]; then
     # Ubuntu
     echo "Installing MKVToolNix using apt-get"
-    apt-get update && \
     apt-get -y install mkvtoolnix && \
     rm -rf /var/lib/apt/lists/*
   elif [ -f /sbin/apk ]; then
@@ -29,7 +28,6 @@ if [ ! -f /usr/bin/mkvmerge ]; then
   else
     # Unknown
     echo "Unknown package manager.  Attempting to install MKVToolNix using apt-get"
-    apt-get update && \
     apt-get -y install mkvtoolnix && \
     rm -rf /var/lib/apt/lists/*
   fi