update postbuild script

next-sitemap.config.js

@@ -0,0 +1,8 @@
+/** @type {import('next-sitemap').IConfig} */
+export default {
+    siteUrl: 'https://notenextra.trance-0.com',
+    changefreq: 'weekly',
+    priority: '0.5',
+    generateIndexSitemap: false,
+    exclude: ['/icon.svg']
+  }