[jwitthuhn]

The readme has this to say about hosting your own blog on it:

"Bear Blog has been built as a platform and not as an individual blog generator. It is more like Substack than Hugo. Due to this it isn't possible to individually self-host a Bear Blog."

"It isn't possible" is obviously not true but a plain reading of both that combined with the license would suggest you can't use bear at all for anything.