Docker is not overkill at all. Having 20 servers to run a few very low utilization is overkill. When you run a whole bunch of stuff on the same server it become

Docker is not overkill at all. Having 20 servers to run a few very low utilization is overkill. When you run a whole bunch of stuff on the same server it becomes a lot simpler than installing them the traditional way. A lot of self hosted server software is not in the repos so you end up having to add extra repos and after you do that a few times I find that something always ends up breaking and ruining the whole OS. Its much simpler to keep the host os basically stock debian with docker installed and then if anything goes bad its contained.