core: reload caddy instead of always restarting

when config file changes

modules/core/networking.nix

@@ -55,6 +55,11 @@ in {
         ++ lib.optionals cfg.enableHelp ["help.local"];
     };
 
+    # Changing the Caddyfile should only trigger a reload, not a restart
+    systemd.services.caddy.reloadTriggers = [
+      config.services.caddy.configFile
+    ];
+
     # Caddy reverse proxy for local services like cups
     services.caddy = {
       enable = cfg.enableCaddy;