Make Docker work

This tells you how much I use it 😅

os/default.nix

@@ -8,6 +8,7 @@
     ./ccc
     ./common.nix
     ./desktop.nix
+    ./dev
     ./diff
     ./gaming
     ./geoffrey.nix

os/dev/default.nix

@@ -0,0 +1,7 @@
+{ pkgs, lib, config, ... }:
+{
+  config = lib.mkIf config.frogeye.dev.docker {
+    virtualisation.docker.enable = true;
+    users.users.geoffrey.extraGroups = [ "docker" ];
+  };
+}