Me and my friend are starting to run a server but for several reasons we can't close our current server to 1.14 until the important plugins are updated, so we decided to create a new world and build the spawn area using Hamachi and a "LAN" server, based off my PC. While this is a 'good enough' temporary solution, I would love it if the world was updated automatically (or almost automatically) between the people who are working on the spawn.
I'm looking for a program that will automatically update the server for the other people when it detects that the world file changed (preferably), OR when any of us tell the program to update the file for the rest of us. I know such a program exists because I have used something like it a handful of time for
classes, but I can't remember or find it. All my searches turn up stuff that are completely different than what I'm looking for. Anyone know of a method or program to accomplish this?