add docker

modules/nix/containers/docker.nix

@@ -0,0 +1,20 @@
+{
+  lib,
+  config,
+  ...
+}:
+let
+  inherit (lib) mkIf mkOption types;
+in
+{
+  options.smayzy.docker.enable = mkOption {
+    type = types.bool;
+    default = false;
+    description = "enable docker";
+  };
+
+  config = mkIf config.smayzy.docker.enable {
+    virtualisation.docker.enable = true;
+    users.extraGroups.docker.members = [ "smayzy" ];
+  };
+}