generify the vpn setup

nixos/hosts/shodan/configuration.nix

@@ -3,7 +3,6 @@
   outputs,
   lib,
   pkgs,
-  config,
   ...
 }: {
   imports = [
@@ -15,6 +14,8 @@
     # Or modules exported from other flakes (such as nix-colors):
     # inputs.nix-colors.homeManagerModules.default
 
+    outputs.nixosModules.vpn-ip
+
     # Import the shared settings
     ../../desktop/package-configs/firefox
 
@@ -63,27 +64,11 @@
     firewall.allowedTCPPorts = [22];
 
     hostName = "shodan";
-
-    wireguard.enable = true;
-
-    wg-quick.interfaces = {
-      wg0 = {
-        autostart = true;
-        address = ["10.0.0.4/24" "fdc9:281f:04d7:9ee9::4/64"];
-        dns = ["10.0.0.1" "fdc9:281f:04d7:9ee9::1"];
-        listenPort = 51821;
-        privateKeyFile = config.sops.secrets."wg-private-key".path;
-        peers = [
-          {
-            publicKey = "A02sO7uLdgflhPIRd0cbJONIaPP4z8HTxDkmX4NegFg=";
-            endpoint = "84.87.146.85:51821";
-            allowedIPs = ["0.0.0.0/0" "::/0"];
-            persistentKeepalive = 25;
-          }
-        ];
-      };
-    };
   };
+  services.vpn-ip = {
+    ip = "4";
+  };
+
   services = {
     openssh.enable = true; # Enables support for 32bit libs that steam uses