Feature: server component url 접근을 위한 middleware 추가

- vercel/next.js#43704

src/middleware.ts

@@ -0,0 +1,15 @@
+// /middleware.ts
+import { NextResponse } from 'next/server';
+
+export function middleware(request: Request) {
+  // Store current request url in a custom header, which you can read later
+  const requestHeaders = new Headers(request.headers);
+  requestHeaders.set('x-url', request.url);
+
+  return NextResponse.next({
+    request: {
+      // Apply new request headers
+      headers: requestHeaders,
+    },
+  });
+}