Migrate config (frues-pc machine for now) from https://git.peprolinbot.com/peprolinbot/nixos-config, with improvements

modules/podman.nix

@@ -0,0 +1,13 @@
+{pkgs, ...}: {
+  environment.systemPackages = with pkgs; [
+    podman-compose
+  ];
+
+  virtualisation.podman = {
+    enable = true;
+    # Create a `docker` alias for podman, to use it as a drop-in replacement
+    dockerCompat = true;
+    # Required for containers under podman-compose to be able to talk to each other.
+    defaultNetwork.settings.dns_enabled = true;
+  };
+}