centroid: add lan revproxy

machine/centroid/default.nix

@@ -62,5 +62,24 @@
     '';
   };
 
+  services.nginx = {
+    enable = true;
+    recommendedProxySettings = true;
+    virtualHosts = {
+      default = {
+        default = true;
+        locations."/".return = "444";
+      };
+      "centroid.lan" = {
+        listen = [ { addr = "centroid.lan"; } ];
+        locations."/" = {
+          proxyWebsockets = true;
+          proxyPass = "http://localhost:6680";
+        };
+      };
+    };
+  };
+  networking.firewall.allowedTCPPorts = [ 80 ];
+
   system.stateVersion = "23.11";
 }