Initial upload of BB-Apartment 2026 website.

Adds the complete Next.js website including i18n routing, house and
apartment pages, Beds24 v2 integration for live availability/pricing,
Stripe checkout, contact forms, Docker setup and deployment docs.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

app/sitemap.ts

@@ -0,0 +1,50 @@
+import { MetadataRoute } from "next";
+import { houses } from "@/src/config/apartments";
+
+const baseUrl = "https://bb-apartment.de";
+
+export default function sitemap(): MetadataRoute.Sitemap {
+  const locales = ["de", "en"];
+
+  const staticRoutes: MetadataRoute.Sitemap = [
+    { url: baseUrl, lastModified: new Date() },
+    ...locales.map((locale) => ({
+      url: `${baseUrl}/${locale}`,
+      lastModified: new Date(),
+    })),
+    ...locales.map((locale) => ({
+      url: `${baseUrl}/${locale}/houses`,
+      lastModified: new Date(),
+    })),
+    ...locales.map((locale) => ({
+      url: `${baseUrl}/${locale}/contact`,
+      lastModified: new Date(),
+    })),
+    ...locales.map((locale) => ({
+      url: `${baseUrl}/${locale}/imprint`,
+      lastModified: new Date(),
+    })),
+    ...locales.map((locale) => ({
+      url: `${baseUrl}/${locale}/privacy`,
+      lastModified: new Date(),
+    })),
+  ];
+
+  const houseRoutes: MetadataRoute.Sitemap = houses.flatMap((house) =>
+    locales.map((locale) => ({
+      url: `${baseUrl}/${locale}/houses/${house.slug}`,
+      lastModified: new Date(),
+    }))
+  );
+
+  const apartmentRoutes: MetadataRoute.Sitemap = houses.flatMap((house) =>
+    house.apartments.flatMap((apartment) =>
+      locales.map((locale) => ({
+        url: `${baseUrl}/${locale}/apartments/${apartment.slug}`,
+        lastModified: new Date(),
+      }))
+    )
+  );
+
+  return [...staticRoutes, ...houseRoutes, ...apartmentRoutes];
+}