We’re already using Github issues https://github.com/dgraph-io/dgraph/issues for filing bugs. Anyone trying out or working on Dgraph could easily use Github issues to file a bug. Many projects hosted on Github use issues for this.
At a later point, once we start having real users, I think it might be a good idea to have something like a user group using Google Groups. The barrier to singing up and using a user group is really low, lower than Github. Most users are already familiar with them. And they can also search the group archives to see if something similar has be discussed in the past.
It’s really easy to set up firstname.lastname@example.org and start receiving bug reports there. But we’d also have to keep this in sync with Github issues, which is ideally suited to discuss bugs in an open forum so everyone is aware of the discussion taking place.