Right, our recommendation is to run Zulip on a dedicated VM or container, which I'm sure is how Mozilla will install any self-hosted chat software.

For context, the background for that advice is that most folks who want Zulip to share with other systems are running a cheap "shared hosting" server with 5 different apps on it and without root access. Before we added that advice, more than 50% of requests for help installing Zulip were problems specific to that type of environment where the user wasn't going to succeed in any case (e.g. because they had an insufficient RAM quota from their hosting provider anyway).

There are reasonable use cases that would benefit from our investing in making this possible, but container technology is convenient enough in 2019 that it doesn't feel worth it over other high-value investments in making Zulip accessible to a wider audience.