Add basic NixOS configuration for alucard

nixos/config/alucard.nix

@@ -0,0 +1,41 @@
+{ self, nixos-hardware, ... }: { lib, config, pkgs, ... }: {
+  imports = with self.nixosModules; [
+    default
+    headless
+    mimalloc
+    physical
+  ];
+
+  networking = {
+    domain = "nyantec.com";
+  };
+
+  services.gobgpd = {
+    enable = true;
+    settings = {
+      global = {
+        as = 208250;
+        router-id = "45.150.121.0";
+      };
+
+      neighbors = [
+      ] ++ map (n: {
+        config = {
+          neighbor-address = "2a0f:be00:1::${toString n}";
+          peer-as = 208250;
+        };
+      }) [ 1 2 3 ];
+    };
+  };
+
+  services.ntpd-rs = {
+    enable = true;
+    settings = {
+      source = map (address: {
+        mode = "server";
+        inherit address;
+      }) (map (n: "ptbtime${toString n}.ptb.de") (lib.range 1 4)
+      ++ map (host: "${host}.nyantec.com") [ "casper" "melchior" "balthasar" ]);
+    };
+  };
+}