Added timestamp check to wget to reduce bandwidth.

entrypoint.sh

@@ -8,7 +8,7 @@ if [ -z "$MINECRAFT_VERSION" ]; then
 fi
 
 # Download Minecraft client .jar (Contains textures used by Minecraft Overviewer)
-wget https://s3.amazonaws.com/Minecraft.Download/versions/${MINECRAFT_VERSION}/${MINECRAFT_VERSION}.jar -P /home/minecraft/.minecraft/versions/${MINECRAFT_VERSION}/
+wget -N https://s3.amazonaws.com/Minecraft.Download/versions/${MINECRAFT_VERSION}/${MINECRAFT_VERSION}.jar -P /home/minecraft/.minecraft/versions/${MINECRAFT_VERSION}/
 
 # Run the world renders (One pass to make map, one to generate points of interests)
 overviewer.py --config /home/minecraft/config.py