feat(unbound): adding dynamic host IP function

modules/server/unbound/default.nix

@@ -7,6 +7,15 @@
 let
   unit = "unbound";
   cfg = config.server.${unit};
+
+  hostIp =
+    hostname:
+    if hostname == "ziggy" then
+      "192.168.88.12"
+    else if hostname == "sobotka" then
+      "192.168.88.14"
+    else
+      throw "No IP defined for host ${hostname}";
 in
 {
   options.server.${unit} = {
@@ -52,7 +61,7 @@ in
             infra-cache-slabs = 8;
             interface = [
               "127.0.0.1@5335"
-              "192.168.88.14@5335"
+              "${hostIp config.networking.hostName}@5335"
               "::@5335"
             ];
             key-cache-slabs = 8;