[derefr]

I'm not sure there is truly such a thing as a "one-off" in the sense you're using it. What happens when your server dies (e.g. catastrophic disk failure, etc)—how do you get your service set up again? If your answer is basically "I re-make it from scratch", then Docker will save you a lot of time, no matter what scale you're operating at. Every Dockerfile is effectively a reproducible build; you'll never need to wonder what dark magicks brought the current state of the system about, because they're all explicitly documented right there, starting from a known-to-its-very-SHA base-image.

If you ever heard some of Heroku's propaganda surrounding "eternal applications", it also applies here: the stack you're deploying on will never update out from under you, because it's pinned by your Dockerfile. You can confidently move your app to any old server and it'll run exactly the same. One good analogy I've heard is that a Docker image is the reductio ad absurdum of a static binary: it doesn't depend on your system, just on itself.

[sp332]

Where do you put all of your data? Edit: specifically, ZNC keeps an archive of some channels for me. If I ran it in a Docker container, would the data be saved somewhere if, say, the power went out?