Is it possible to restore server (Using TMachine) without restoring the whole volume?

I had a server crash, and in the process of fixing that, I do not want to restore the whole volume (clean install, please and thank you). But, Migration Assistant/Time machine will not let me select anything in the restore process.

Honestly, if I could restore my wiki, that would be enough. However, if that cannot be done without bringing everything back (along with the problems that helped lead to the crash) I will simply recreate.

P.S. How do I make the new setup less prone to this disaster?

Thanks