feat: docker - pulling using containerd

modules/nixos/core-server.nix

@@ -92,6 +92,12 @@
 
   virtualisation.docker = {
     enable = true;
+    daemon.settings = {
+      # enables pulling using containerd, which supports restarting from a partial pull
+      # https://docs.docker.com/storage/containerd/
+      "features" =  {"containerd-snapshotter" =  true; };
+    };
+
     # start dockerd on boot.
     # This is required for containers which are created with the `--restart=always` flag to work.
     enableOnBoot = true;