Enable Bull Dashboard without environment variable

apps/api/src/services/queues/statistics-gathering/statistics-gathering.module.ts

@@ -13,6 +13,8 @@ import { StatisticsGatheringService } from './statistics-gathering.service';
 @Module({
   exports: [BullModule, StatisticsGatheringService],
   imports: [
+    ...(process.env.ENABLE_FEATURE_STATISTICS === 'true'
+      ? [
           BullBoardModule.forFeature({
             adapter: BullAdapter,
             name: STATISTICS_GATHERING_QUEUE,
@@ -20,7 +22,9 @@ import { StatisticsGatheringService } from './statistics-gathering.service';
               displayName: 'Statistics Gathering',
               readOnlyMode: process.env.BULL_BOARD_IS_READ_ONLY !== 'false'
             }
-    }),
+          })
+        ]
+      : []),
     BullModule.registerQueue({
       name: STATISTICS_GATHERING_QUEUE
     }),