SleepingProcessB
If you don’t afraid of ugly representation (which actually can be fixed with CSS) you can use fossil-scm which is used (and written by the same authors) by SQLite. It is just a single executable file. It’s comes not only as SCM, but has embedded WiKi, ticketing, email notification…
If you familiar with mhdd or victoria, you can try to enforce internal controller to replace pending sectors, there are chances it would succeed, but the disk itself must put replaced ASAP. You also would need some computer which you can turn from AHCI/RAID mode to plain IDE to be able to issue raw commands while recovering disk
can I host a mail server on my home server and use cloudflare tunnel.
No. IPs of cloud flare are blocked on most email servers and you really need port 25 be opened. Also residential IPs are in PBL lists, which also used on email servers to get rid of army infected PC. If you going to get intermediate proxy, choose them carefully due to a lot of cheap (or with bad reputation) hostings are rejected (or has much more spam score) too