podman: conf in extra file

modules/core/default.nix

@@ -7,6 +7,7 @@
     ./initrd-ssh.nix
     ./mysql.nix
     ./nginx.nix
+    ./podman.nix
     ./postgres.nix
     ./sssd.nix
     ./zsh.nix

modules/core/podman.nix

@@ -0,0 +1,17 @@
+{ config, pkgs, ... }:
+{
+  # From: https://nixos.wiki/wiki/Podman
+  virtualisation.containers.enable = true;
+  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;
+    };
+  };
+  virtualisation.oci-containers.backend = "podman";
+}

modules/kanboard.nix

@@ -5,23 +5,7 @@ let
 in
 {
   sops.secrets."kanboard_env" = { };
-
-
-  # Podman
-  virtualisation.containers.enable = true;
-  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;
-    };
-  };
-  virtualisation.oci-containers.backend = "podman";
-
+  
   virtualisation.oci-containers = {
     containers.kanboard = {
       image = "ghcr.io/kanboard/kanboard:v1.2.35";