add docker

configuration.nix

@@ -106,13 +106,17 @@
   # Define a user account. Don't forget to set a password with ‘passwd’.
   users.users.chrigi = {
     isNormalUser = true;
-    extraGroups = [ "wheel" "networkmanager"]; 
+    extraGroups = [ "wheel" "networkmanager" "docker"];
     initialPassword = "password";
     packages = with pkgs; [
       firefox
       tree
     ];
   };
+  virtualisation.docker = {
+    enable = true;
+    storageDriver = "btrfs";
+  };
   xdg.portal = {
     enable = true;
     extraPortals = [ pkgs.xdg-desktop-portal-hyprland ];