fix: Allow all hosts in preview mode for Easypanel

- Set preview.allowedHosts to true
- Allows Easypanel dynamic hostnames
- Safe because container is behind Easypanel proxy
- No need to hardcode specific domains

vite.config.js

@@ -0,0 +1,10 @@
+import { defineConfig } from 'astro/config';
+
+export default defineConfig({
+  server: {
+    allowedHosts: true  // Allow all hosts (safe behind Easypanel proxy)
+  },
+  preview: {
+    allowedHosts: true  // Allow all hosts for production preview
+  }
+});