This is my question. I don’t actually see any statements from the company here or in the post that you can actually self-host and point the app at your server.

This is my question. I don’t actually see any statements from the company here or in the post that you can actually self-host and point the app at your server. The app dumps you in a mandatory sign-up flow with no server url setting possible. It seems more likely this is only open source for audit/transparency purposes. It’s absolutely their right to do this, but they should make it clear.