It used to be the case that the ZK website/server would be able to read and utilize maps hosted on the old springfiles repository, so that users wouldn't have to manually search and download maps from that mirror and then reupload to the ZK server. Since that went mirror went down, I assume this functionality was removed. However, there seems to be a new repository that can be found at https://springfiles.springrts.com. More information can be found at https://github.com/spring/upq.
It used to be the case that the ZK website/server would be able to read and utilize maps hosted on the old springfiles repository, so that users wouldn't have to manually search and download maps from that mirror and then reupload to the ZK server. Since that went mirror went down, I assume this functionality was removed. However, there seems to be a new repository that can be found at https://springfiles.springrts.com. More information can be found at https://github.com/spring/upq.