About a roadmap

Hi everyone! I don't know if this question has already been asked but I didn't find something approaching. Where and when could I find a roadmap for Sailfish OS? I know the development is in progress but just for having a look on what are the priorities and what's the next to come. Thanks and keep the good work on! ---------- **I also want to know what will be the updates frequency (weekly, monthly, 1 ,2 or 3...).**