net: hardcode the host/IPs for desko/servo/lappy

modules/universal/default.nix

@@ -5,6 +5,7 @@
     ./allocations.nix
     ./env
     ./fs.nix
+    ./net.nix
     ./secrets.nix
     ./users.nix
     ./vpn.nix

modules/universal/net.nix

@@ -0,0 +1,12 @@
+{ config, ... }:
+
+{
+  # if using router's DNS, these mappings will already exist.
+  # if using a different DNS provider (which servo does), then we need to explicity provide them.
+  # ugly hack. would be better to get servo to somehow use the router's DNS
+  networking.hosts = {
+    "192.168.0.5" = [ "servo" ];
+    "192.168.0.20" = [ "lappy" ];
+    "192.168.0.22" = [ "desko" ];
+  };
+}