fix: allow custom production host in dev server

Add gekon.pvenode.ru to Vite allowedHosts so domain-based access works behind proxy/certificate setup.

vite.config.ts

@@ -6,4 +6,10 @@
 // You can pass additional config via defineConfig({ vite: { ... } }) if needed.
 import { defineConfig } from "@lovable.dev/vite-tanstack-config";
 
-export default defineConfig();
+export default defineConfig({
+  vite: {
+    server: {
+      allowedHosts: ["gekon.pvenode.ru"],
+    },
+  },
+});