Add helpful extraction method

entrypoint.sh

@@ -4,6 +4,8 @@ image_path="/data/filesystem.img"
 zip_path="/filesystem.zip"
 
 if [ ! -e $image_path ] && [ -e $zip_path ]; then
+    echo "No filesystem detected at ${image_path}!"
+    echo "Extracting..."
     unzip $zip_path
     mv *.img $image_path
 fi