Callout nodejs_compat instructions more explicitly

Author: irvinebroque

pages/cloudflare/get-started.mdx

@@ -27,11 +27,15 @@ Then, add a [`wrangler.toml`](https://developers.cloudflare.com/workers/wrangler
 
 ```toml
 name = "my-app"
-compatibility_date = "2024-07-29"
+compatibility_date = "2024-09-23"
 compatibility_flags = ["nodejs_compat"]
 assets = { directory = "public"}
 ```
 
+<Callout>
+As shown above, you must enable the [`nodejs_compat` compatibility flag](https://developers.cloudflare.com/workers/runtime-apis/nodejs/) *and* set your [compatibility date](https://developers.cloudflare.com/workers/configuration/compatibility-dates/) to `2024-09-23` or later, in order for your Next.js app to work with @opennextjs/cloudflare.
+</Callout>
+
 `wrangler.toml` is where you configure your Worker and define what resources it can access via [bindings](/workers/runtime-apis/bindings/).
 
 ##### 3. Update `next.config.mjs`