system/podman: have module available

modules/system/podman/default.nix

@@ -0,0 +1,30 @@
+# Podman related settings
+{ config, inputs, lib, options, pkgs, ... }:
+let
+  cfg = config.my.system.podman;
+in
+{
+  options.my.system.podman = with lib; {
+    enable = mkEnableOption "podman configuration";
+  };
+
+  config = lib.mkIf cfg.enable {
+
+    environment.systemPackages = with pkgs; [
+      podman-compose
+    ];
+
+    virtualisation.podman = {
+      enable = true;
+
+      # Use fake `docker` command to redirect to `podman`
+      dockerCompat = true;
+
+      # Expose a docker-like socket
+      dockerSocket.enable = true;
+
+      # Allow DNS resolution in the default network
+      defaultNetwork.dnsname.enable = true;
+    };
+  };
+}