Set slirp4netns as default bridge backend.

modules/packages/podman.nix

@@ -4,10 +4,15 @@
   virtualisation.podman.enable = true;
   virtualisation.podman.defaultNetwork.settings.dns_enabled = true;
 
+  virtualisation.containers.containersConf.settings = {
+    network.default_rootless_network_cmd = "slirp4netns";
+  };
+
   environment.systemPackages = with pkgs; [
     podman
     podman-compose
     podman-tui
+    passt
     slirp4netns
   ];
 }

modules/services/nextcloud.nix

@@ -74,7 +74,6 @@ helper.mkPodmanService {
           MAIL_DOMAIN: ${config.numbus.services.domain}
           APACHE_DISABLE_REWRITE_IP: 1
           TRUSTED_PROXIES: ${config.numbus.networking.ipAddress}
-          OVERWRITEPROTOCOL: https
           NC_default_phone_region: "${config.numbus.language}"
           NC_default_language: "${config.numbus.language}"
           NC_default_locale: "${config.numbus.locale}"