How would I go about making my project open source? Especially with the backend being in supabase?

I guess that depends on what you are defining open source as. All the Supabase hackathon projects are considering open source. Link to tweets on winners from last time https://discord.com/channels/839993398554656828/869573998877483058/965827669512032297 Also see the hackathon thread for project links over time. Googling Supabase opensource finds links, including this one with some open source projects (although Supabase modules are included in the list) https://www.libhunt.com/topic/supabase#google_vignette