diff --git a/.env.default b/.env.default
index 05c3bed..d119f02 100644
--- a/.env.default
+++ b/.env.default
@@ -4,4 +4,4 @@ DEBUG=false
 
 # Frontend specific
 VITE_API_TARGET=https://pies.com
-VITE_ALLOWED_HOST=pies.com
\ No newline at end of file
+VITE_ALLOWED_HOST=pies.com # for sub domens add . before host address
\ No newline at end of file
diff --git a/kittyurl-frontend/vite.config.ts b/kittyurl-frontend/vite.config.ts
index e9f29b9..f5ae0de 100644
--- a/kittyurl-frontend/vite.config.ts
+++ b/kittyurl-frontend/vite.config.ts
@@ -1,29 +1,67 @@
-import { defineConfig, loadEnv } from 'vite'
+import { defineConfig, loadEnv, type Plugin } from 'vite' // Zmieniono na 'type Plugin'
 import react from '@vitejs/plugin-react'
 import tailwindcss from '@tailwindcss/vite'
 import path from 'path'
 
-export default defineConfig(({ mode }) => {
-    // Ścieżka do folderu nadrzędnego 
-    const envDirectory = path.resolve(__dirname, '..');
+// Plugin obsługujący logikę przekierowań
+const domainRedirectPlugin = (targetUrl: string, useSubdomains: boolean, debug: boolean): Plugin => ({
+    name: 'domain-redirect',
+    configureServer(server) {
+        server.middlewares.use((req, res, next) => {
+            const host = req.headers.host; // np. "ssss.localhost:6568"
+            if (!host) return next();
 
-    // Wczytujemy zmienne do użytku
+            const hostname = host.split(':')[0]; // usuwamy port, zostaje "ssss.localhost"
+            const targetHost = new URL(targetUrl).hostname;
+
+            // LOGIKA TESTOWA DLA LOCALHOST:
+            // Jeśli host to np. ssss.localhost, a nie czysty localhost:
+            const isSubdomainOfLocalhost = hostname.endsWith('.localhost');
+            const isPureLocalhost = hostname === 'localhost' || hostname === '127.0.0.1';
+
+            if (debug) {
+                console.log(`[Debug] Host: ${hostname}, SubOfLocal: ${isSubdomainOfLocalhost}, Pure: ${isPureLocalhost}`);
+            }
+
+            // Przekieruj jeśli:
+            // 1. To subdomena localhosta (do testów)
+            // 2. LUB to subdomena ktty.is, a subdomeny są wyłączone
+            if ((isSubdomainOfLocalhost && hostname !== 'localhost') || (!useSubdomains && hostname !== targetHost && !isPureLocalhost)) {
+                if (debug) console.log(`[Redirect] Z ${hostname} na ${targetUrl}`);
+
+                res.writeHead(301, { Location: `${targetUrl}${req.url}` });
+                return res.end();
+            }
+
+            next();
+        });
+    }
+});
+
+export default defineConfig(({ mode }) => {
+    const envDirectory = path.resolve(__dirname, '..');
     const env = loadEnv(mode, envDirectory, '');
 
-    return {
-       
-        envDir: envDirectory,
+    // Twoje zmienne z .env
+    const publicUrl = env.PUBLIC_URL;
+    const useSubdomains = env.USE_SUBDOMAINS === 'true';
+    const isDebug = env.DEBUG === 'true';
 
+    return {
+        envDir: envDirectory,
         plugins: [
             react(),
             tailwindcss(),
+            domainRedirectPlugin(publicUrl, useSubdomains, isDebug)
         ],
         server: {
             port: 6568,
+            host: true,
         },
         preview: {
             port: 6568,
-            allowedHosts: [env.VITE_ALLOWED_HOST],
+            
+            allowedHosts: [env.VITE_ALLOWED_HOST , 'localhost'],
         },
     }
 })
\ No newline at end of file