Either that, or it’s the new way of installing applications on your own computer. These just happen to be web accessible.

It seems to be working fine for me, but the page did say they were not doing login with Reddit anymore.

When you say “no built-in security”, are you talking about not having https ? Paperless-ngx does have login security with users and passwords. I believe they recommend using nginx as a reverse-proxy server to implement https if you need it.

I like BackupPC, it’ll do what you want but it may be more challenging to learn than some of these other options.

Every time I upgraded the StandardNotes self hosting docker instance, some configuration setting changed and I had to go figure out what had changed and update it. Then they started to require some sort of a key to actually self-host. They were giving out free keys to users who were grandfathered-in but that left a bad taste in my mouth.

Try https://joplinapp.org . You can self-host your database with something like Nextcloud or Apache Server using WebDAV. I moved from StandardNotes after they got tricky about Self-hosting.