Rolling updates out automatically?

Hi all,

I have not started my project yet using CI3 but I am coming up with a plan for it and I am wondering if its possible to get the project to look at a file location and if the files have been updated, you can click an update button (or have it check automatically) and update itself (the files will be on the same server but with a different domain)

I am just curious if its possible (I am sure it is) and if there is any simple examples out there that I can get ideas from?

Thanks,
Doomie