migrated lambdas to setup.nix + lambda for server files

modules/servers/kavita.nix

@@ -1,12 +1,7 @@
-{
-  lib,
-  config,
-  proxyReverse,
-  setup,
-  ...
-}:
+{ lib, config, ... }:
 let
   cfg = config.my.servers.kavita;
+  setup = import ../setup.nix { inherit lib config; };
 in
 {
   options.my.servers.kavita = setup.mkOptions "kavita" "library" config.services.kavita.settings.Port;
@@ -27,7 +22,7 @@ in
         tokenKeyFile = config.sops.secrets.kavita-token.path;
       };
       nginx.virtualHosts."${cfg.host}" = lib.mkIf cfg.enableProxy (
-        proxyReverse cfg.hostName cfg.port // { }
+        setup.proxyReverse cfg.hostName cfg.port // { }
       );
     };
   };