added docker, removed cam net isolation

system/modules/docker/default.nix

@@ -0,0 +1,27 @@
+{ pkgs, lib, config, ... }:
+
+with lib;
+let
+  cfg = config.modules.system.docker;
+
+in
+{
+  options.modules.system.docker = { enable = mkEnableOption "Enable Docker"; };
+  config = mkIf cfg.enable {
+    virtualisation.docker = {
+      enable = true;
+
+      # Explicit storage driver for ext4/xfs filesystems
+      storageDriver = "overlay2";
+    };
+
+    # Add docker package to system packages
+    environment.systemPackages = with pkgs; [
+      docker
+      docker-compose
+    ];
+
+    # Add user to docker group
+    users.users.${config.user.name}.extraGroups = [ "docker" ];
+  };
+}