docs(nestjs-bullmq-pro): add queue events listeners section

docs/gitbook/SUMMARY.md

@@ -73,6 +73,7 @@
 * [Batches](bullmq-pro/batches.md)
 * [NestJs](bullmq-pro/nestjs/README.md)
   * [Producers](bullmq-pro/nestjs/producers.md)
+  * [Queue Events Listeners](bullmq-pro/nestjs/queue-events-listeners.md)
   * [API Reference](https://nestjs.bullmq.pro/)
   * [Changelog](bullmq-pro/nestjs/changelog.md)
 * [API Reference](https://api.bullmq.pro)

docs/gitbook/bullmq-pro/nestjs/README.md

@@ -102,3 +102,4 @@ A working example is available [here](https://github.com/taskforcesh/nestjs-bull
 - 💡 [Queues Technique](https://docs.nestjs.com/techniques/queues)
 - 💡 [Register Queue API Reference](https://nestjs.bullmq.pro/classes/BullModule.html#registerQueue)
 - 💡 [Register Flow Producer API Reference](https://nestjs.bullmq.pro/classes/BullModule.html#registerFlowProducer)
+- 💡 [Worker Listener API Reference](https://api.docs.bullmq.io/interfaces/v4.WorkerListener.html)

docs/gitbook/bullmq-pro/nestjs/producers.md

@@ -1,3 +1,5 @@
+# Producers
+
 Job producers add jobs to queues. Producers are typically application services (Nest providers). To add jobs to a queue, first inject the queue into the service as follows:
 
 ```typescript

docs/gitbook/bullmq-pro/nestjs/queue-events-listeners.md

@@ -0,0 +1,49 @@
+# Queue Events Listeners
+
+To register a QueueEvents instance, you need to use **QueueEventsListener** decorator:
+
+```typescript
+import {
+  QueueEventsListener,
+  QueueEventsHost,
+  OnQueueEvent,
+} from '@taskforcesh/nestjs-bullmq-pro';
+
+@QueueEventsListener('queueName')
+export class TestQueueEvents extends QueueEventsHost {
+  @OnQueueEvent('completed')
+  onCompleted({
+    jobId,
+  }: {
+    jobId: string;
+    returnvalue: string;
+    prev?: string;
+  }) {
+    // do some stuff
+  }
+}
+```
+
+And then register it as a provider:
+
+```typescript
+@Module({
+  imports: [
+    BullModule.registerQueue({
+      name: 'queueName',
+      connection: {
+        host: '0.0.0.0',
+        port: 6380,
+      },
+    }),
+  ],
+  providers: [TestQueueEvents],
+})
+export class AppModule {}
+```
+
+## Read more:
+
+- 💡 [Queues Technique](https://docs.nestjs.com/techniques/queues)
+- 💡 [Register Queue API Reference](https://nestjs.bullmq.pro/classes/BullModule.html#registerQueue)
+- 💡 [Queue Events Pro Listener API Reference](https://api.bullmq.pro/interfaces/v6.QueueEventsListenerPro.html)