diff --git a/configurations/nixos/observer-tofu/default.nix b/configurations/nixos/observer-tofu/default.nix
new file mode 100644
index 0000000..02e7012
--- /dev/null
+++ b/configurations/nixos/observer-tofu/default.nix
@@ -0,0 +1,41 @@
+{
+  flake,
+  modulesPath,
+  # config,
+  ...
+}:
+
+let
+  inherit (flake) inputs;
+  inherit (inputs) self;
+in
+{
+  imports = [
+    self.nixosModules.default
+    "${modulesPath}/virtualisation/lxc-container.nix"
+  ];
+  services = {
+    tty-ips.enable = true;
+    uptime-kuma = {
+      enable = true;
+      settings = {
+        DATA_DIR = "/var/lib/uptime-kuma/";
+        UPTIME_KUMA_HOST = "127.0.0.1";
+        PORT = "3001";
+      };
+    };
+  };
+  networking = {
+    firewall.enable = false;
+    yggdrasil = {
+      enable = true;
+      AllowedPublicKeys = [
+        "d0e265fcf663451ae9bc048dc1297749819ce9d48042a986f2866c15a779a074"
+      ];
+    };
+    hostName = "observer-tofu";
+  };
+  environment.systemPackages = [
+  ];
+  system.stateVersion = "25.05";
+}