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Maybe, but when the original docker image is no longer available on docker hub, chances are there will be something better and even easier to setup. And with docker you don't care about installing / uninstalling apps and figuring out where that obscure setting was hidden - all you need is just a stock distro and a bunch of docker-compose.yml files, plus some mounted directories with the actual data.

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But a lot of those unofficial docker images are of unknown quality and could easily contain trojans. It's completely different from installing a package from your distro.

On the plus side, the Dockerfile and the repo with the scripts used to build a container is usually available. If you don't trust it, read through the source and rebuild it. Or just stick to official containers, no matter how terrible they are.

So don't use unofficial ones. :)

Plenty of primary sources package their software for Docker these days.

Even if so you're still spending say 50% of the original time investment every year or so just maintaining it. Unfortunately your options seem to be "set up once then never touch it again" or "update everything regularly and be at the mercy of everything changing and breaking at random times".

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