I had thought Dokku was only for a single host(?) From their docs:

> Dokku is an extensible, open source Platform as a Service that runs on a single server of your choice. [0]

But they have a "pro" version that mentions something about "servers," plural.[1] So maybe that's the difference between regular and pro?

[0]: https://dokku.com/docs/getting-started/installation/

[1]: https://pro.dokku.com/