minor fixes for nextjs

examples/nextjs/src/app/api/[[...bknd]]/route.ts

@@ -1,5 +1,9 @@
 import { getApp } from "@/bknd";
 
+// if you're not using a local media adapter, or file database,
+// you can uncomment this line to enable running bknd on edge
+// export const runtime = "edge";
+
 const handler = async (request: Request) => {
    const app = await getApp();
    return app.fetch(request);