✨ Feat(#47): 메인 페이지 사이트맵 추가

src/app/sitemap.ts

@@ -0,0 +1,19 @@
+import type { MetadataRoute } from "next";
+import { axiosInstance } from "@/services";
+
+type Steady = {
+  id: number;
+  createdAt: Date;
+};
+
+export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
+  const response = await axiosInstance.get(
+    `/api/v1/steadies/search?page=0&like=false&status=RECRUITING`,
+  );
+  return response.data.content.map((steady: Steady) => ({
+    url: `/steadies/${steady.id}`,
+    changefreq: "daily",
+    priority: 0.9,
+    lastModified: new Date(steady.createdAt).toISOString(),
+  }));
+}