since3-website/app/sitemap.ts

import type { MetadataRoute } from "next";

import { site } from "@/modules/shared/config/site";

// One entry per actual route. The in-page anchors (/#projekte etc.) are
// sections of "/", not separate pages, so they don't get their own entry.
export default function sitemap(): MetadataRoute.Sitemap {
  const lastModified = new Date();

  return [
    {
      url: site.url,
      lastModified,
      changeFrequency: "weekly",
      priority: 1,
    },
    {
      url: `${site.url}/impressum`,
      lastModified,
      changeFrequency: "yearly",
      priority: 0.3,
    },
    {
      url: `${site.url}/datenschutz`,
      lastModified,
      changeFrequency: "yearly",
      priority: 0.3,
    },
  ];
}