OK, have a look at GitHub contributors metric. 404 today, 405 yesterday.
Just to clarify, I'm not affiliated with or protecting MinIO, I don't know anything about this software. But it seems to me that there's some overreaction about Docker here, and in reality it is highly possible that this decision might not affect the product the way it's being discussed these days.
Are those active contributors or lifetime contributors? And don't those counts leave out anyone who doesn't have a github account or doesn't associate their got email with their github account?