add a rsync line to the start script for the sub server templates. This would be an easy way to update the plugin jars of each sub server before it starts every time. This can also be used to keep the server jar up to date with a wget call to the paper API or another rsync line to sync the server jars. This is not a good solution in the long term as this will cause lots of writes to the drive. A better solution would be to look at a jar downloaded in the past week and compare it to the md5 checksum of the jar currently in the sub server folder.