Improved the copy to link to aptGet and explain adding deployed packages

Author: samejr

docs/examples/pdf-to-image.mdx

@@ -10,7 +10,7 @@ This example demonstrates how to use Trigger.dev to turn a PDF into a series of
 
 ## Update your build configuration
 
-To use this example, add these build settings to your `trigger.config.ts` file:
+To use this example, add these build settings below to your `trigger.config.ts` file. They ensure that the `mutool` and `curl` packages are installed when you deploy your task. You can learn more about this and see more build settings [here](/config/config-file#aptget).
 
 ```ts trigger.config.ts
 export default defineConfig({