Fix localhost redirect loops in proxy middleware using nextUrl.clone() and trustHost

proxy.ts

@@ -7,11 +7,15 @@ export default auth((req) => {
   const isLoginPage = nextUrl.pathname === "/login";
 
   if (!isLoggedIn && !isLoginPage) {
-    return NextResponse.redirect(new URL("/login", req.url));
+    const url = nextUrl.clone();
+    url.pathname = "/login";
+    return NextResponse.redirect(url);
   }
 
   if (isLoggedIn && isLoginPage) {
-    return NextResponse.redirect(new URL("/dashboard", req.url));
+    const url = nextUrl.clone();
+    url.pathname = "/dashboard";
+    return NextResponse.redirect(url);
   }
 
   return NextResponse.next();