Ask HN: How much of a security concern is self-hosting code?

Same as for any software, monitor security announcements, apply updates and audit the software for security issues.

Self-hosting is great, however, I did learn the hard way when not only did my server crash, but the backup solution I had instilled stopped working as well.

As my future plan, I pretty much just type in a few Git commands and I have a copy on my server and in Github. Will be coming up with a few solutions to make backups of my databases.