Extract Docker and screenkey modules

nix/modules/nixos/features/cli/docker.nix

@@ -0,0 +1,16 @@
+{ lib, config, ... }:
+
+{
+  options.features.cli.docker.enable = lib.mkEnableOption "Enable Docker";
+
+  config = lib.mkIf config.features.cli.docker.enable {
+    virtualisation.docker = {
+      enable = true;
+
+      autoPrune = {
+        enable = true;
+        dates = "weekly";
+      };
+    };
+  };
+}