fix(middleware): bring back middleware for TRACKER_SCRIPT_NAME functionality

middleware.ts

@@ -0,0 +1,21 @@
+import { NextResponse } from 'next/server';
+import type { NextRequest } from 'next/server';
+
+export async function middleware(req: NextRequest) {
+  const scriptName = process.env.TRACKER_SCRIPT_NAME;
+
+  if (scriptName) {
+    const url = req.nextUrl.clone();
+    const { pathname } = url;
+    const names = scriptName.split(',').map(name => name.trim() + '.js');
+
+    if (names.find(name => pathname.endsWith(name))) {
+      url.pathname = '/script.js';
+      return NextResponse.rewrite(url);
+    }
+  }
+}
+
+export const config = {
+  matcher: '/:path*',
+};