decisions: use port mapping insted of network mode=host

modules/decisions.nix

@@ -10,10 +10,10 @@ in
       volumes = [
         "/var/lib/nextcloud/data/root/files/FSR/protokolle:/protokolle:ro"
       ];
+      ports = [ "127.0.0.1:5055:5055" ];
       environmentFiles = [
         config.sops.secrets."decisions_env".path
       ];
-      extraOptions = [ "--network=host" ];
     };
   };