chore(proxy-container): update README for proper request forwarding (#…

…8692)

* chore(proxy-container): update README for proper request forwarding

* chore: remove unused import

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

packages/proxy-container/README.md

@@ -29,16 +29,25 @@ Use it:
 
 ```ts
 import { Client } from 'discord.js';
-import { ProxyAgent } from 'undici';
 
 const client = new Client({
 	// other options,
 	rest: {
-		agent: new ProxyAgent('https://localhost:8080'),
+		api: 'http://localhost:8080/api',
 	},
 });
 ```
 
+Or with just `@discordjs/rest`:
+
+```ts
+import { REST } from '@discordjs/rest';
+
+const rest = new REST({
+	api: 'http://localhost:8080/api',
+});
+```
+
 ## Links
 
 - [Website](https://discord.js.org/) ([source](https://github.com/discordjs/website))