more refactoring

hosts/diva/configuration.nix

@@ -0,0 +1,25 @@
+{ inputs, ... }:
+{
+  imports = [ ./features ];
+  networking.hostName = "diva"; # Define your hostname.
+
+  networking.firewall = {
+    enable = true;
+    allowedTCPPorts = [
+      22 # ssh
+      80 # http
+      443 # ssl
+    ];
+  };
+
+  # reducing disk usage
+  boot.loader.systemd-boot.configurationLimit = 10;
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 1w";
+  };
+
+  nix.settings.auto-optimise-store = true;
+  services.caddy.enable = true;
+}