Multiple people have been asking about it, so the support for self-hosting using docker is added.
The quickest way to get it up and running is using docker-compose: https://github.com/RikudouSage/LemmySchedule/#docker-compose
In the coming days I’ll be adding support for locking the app to a single instance only, meaning if you self host it alongside your Lemmy instance, only people from your own instance will be able to use it.
Edit: The hosted version is at https://schedule.lemmings.world and the support forum is at [email protected]
I would imagine it was based on what time upvotes came in for a particular community. Someone would need to collect data on that separately. I don’t think there’s a built in API for it yet