added system to dirs

modules/system/podman/default.nix

@@ -0,0 +1,28 @@
+{ pkgs, config, lib, ... }:
+
+let
+  cfg = config.system.podman;
+in
+{
+  options.system.podman = {
+    enable = lib.mkEnableOption "enables podman";
+  };
+
+  config = lib.mkIf cfg.enable {
+
+    # install the binary for compose
+    environment.systemPackages = with pkgs; [ podman-compose ];
+
+    virtualisation = {
+      oci-containers.backend = "podman";
+      podman = {
+        enable = true;
+        dockerCompat = true;
+        autoPrune.enable = true;
+        defaultNetwork.settings = {
+          dns_enabled = true;
+        };
+      };
+    };
+  };
+}