Add tor-relay config

hosts/tor-relay/configuration.nix

@@ -1,12 +1,23 @@
-{ config, pkgs, ... }:
-
+{ ... }:
 {
-  imports = [
-    ./hardware-configuration.nix
-    ./tor.nix
-  ];
+  boot.loader.grub = {
+    enable = true;
+    device = "/dev/vda";
+  };
 
   networking = {
+    interfaces = {
+      "enp6s18".ipv6.addresses = [{
+        address = "2001:470:5429::B3";
+        prefixLength = 64;
+      }];
+    };
+
+    defaultGateway6 = {
+      address = "2001:470:5429::1";
+      interface = "enp6s18";
+    };
+
     hostName = "tor-relay";
     firewall.enable = false;
   };