chore(site): fix portforward issue with vite (#13262)

site/vite.config.ts

@@ -37,6 +37,7 @@ export default defineConfig({
     },
   },
   server: {
+    host: "127.0.0.1",
     port: process.env.PORT ? Number(process.env.PORT) : 8080,
     headers: {
       // This header corresponds to "src/api/api.ts"'s hardcoded FE token.