docs: remove outdated info about ng serve (angular#53890)

PR Close angular#53890

aio/content/guide/service-worker-getting-started.md

@@ -61,16 +61,25 @@ ng build              # build the app for production; code is in the /dist folde
 
 </code-example>
 
-The Angular development server (`ng serve`) doesn't support service worker applications.
-The [`http-server package`](https://www.npmjs.com/package/http-server) from npm does.
-You can run it without installing it like this:
+To enable service worker support during local development, use the production configuration with the following command:
+
+<code-example format="shell" language="shell">
+
+ng serve --prod
+
+</code-example>
+
+Alternatively, you can use the [`http-server package`](https://www.npmjs.com/package/http-server) from
+npm, which supports service worker applications. Run it without installation using:
 
 <code-example format="shell" language="shell">
 
 npx http-server -p 8080 -c-1 dist/&lt;project-name&gt;/browser
 
 </code-example>
 
+This will serve your application with service worker support at http://localhost:8080.
+
 </div>
 
 ### Initial load