## Avoiding Event Loop Blocking
Never execute synchronous CPU-heavy loops on the main event loop thread. Delegate intensive encryption or image processing tasks to Worker Threads or external background job queues.
```javascript
// Recommended: Async Non-blocking Handler
app.get('/api/v1/data', async (req, res, next) => {
try {
const result = await dbService.fetchAsyncData();
res.json({ status: 'success', data: result });
} catch (err) {
next(err);
}
});
```
Docker for Beginners: Containerizing Production Apps
Step-by-step guide to writing multi-stage Dockerfiles and containerizing Next.js and Node.js applications.