For anyone using Docker (Desktop for Windows) with WSL2, the latest prerelease builds of WSL, which you may automatically get from the Microsoft Store, will break Docker completely -- see https://github.com/microsoft/WSL/issues/11794 -- and the solution is to download the 2.2.4 MSI for WSL (from that repo) and install it -- and then turn Microsoft Store > Settings > Apps > do not update! (I wish I'd found that solution first... but it took me about 3 1/2 hours of debugging and tinkering and lots of uninstall/reboot/reinstall cycles to get there!)
WSL 2.3.13 is available and fixes the Docker issue!