How do I download a file from Cloudflare R2 using Node.js?

Use the `Bucket.get()` method from the `@cloudflare/r2-js` SDK. Provide the object name (key) you want to download. The method returns a `ReadableStream` which you can pipe to a file or process in memory. Handle potential errors, such as the object not existing or insufficient permissions. Consider using a library like `stream-to-array` if you need to read the entire file into an array.