trying to unmodularize my setup

nixosModules/module-docker.nix

@@ -0,0 +1,24 @@
+{ pkgs, lib, config, ... }:
+# enable docker
+# not all systems need this
+
+{
+
+  options = {
+    dockerModule.enable =
+      lib.mkEnableOption "enables Docker Module";
+  };
+
+  config = lib.mkIf config.dockerModule.enable {
+
+    # Enable Docker
+    virtualisation.docker = {
+      enable = true;
+      autoPrune = {
+        enable = true;
+      };
+    };
+
+  };
+
+}