Attempt to update blockhouse to 25.05 flake and break out a few common items

nixos/features/gpu/nvidia.nix

@@ -10,6 +10,9 @@
   # Fix stupid UI scaling bug
   services.xserver.dpi = 96;
 
+  # Docker NVIDIA
+  virtualisation.docker.enableNvidia = true;
+
   hardware.nvidia = {
     # Modesetting is required.
     modesetting.enable = true;

nixos/features/openssh-server.nix

@@ -3,6 +3,7 @@
     enable = true;
     settings = {
       PermitRootLogin = lib.mkForce "no";
+      StreamLocalBindUnlink = "yes";
       PasswordAuthentication = false;
     };
   };