How to add a new group?

I love Bazzite, mostly. But I cannot find anything about how to add a new group. An google/brave is no help. They all assume I am looking for how to add group packages, as opposed to a group. Can anyone point me to the Bazzite-like way of adding a new group, please?

Solution

if you are creating new group the normal way will work because etc is writable, if you are adding an existing group to your user (e.g adding your user to docker group), there is workaround required