nestjs-pino: [BUG] System logs skipped on startup

Hi,

I am using pino with configuration as illustrated below:

// app.module.ts
import { Module } from '@nestjs/common';
import { LoggerModule } from 'nestjs-pino';
import { AppController } from './app.controller';
import { AppService } from './app.service';

import * as pino from 'pino';

const logger = pino({
  level: process.env.NODE_ENV !== 'prod' ? 'debug' : 'info',
},pino.destination({
  minLength: 4096,
  sync: false,
}));

setInterval(function() {
  logger.flush();
}, 5000).unref();

@Module({
  imports: [
    LoggerModule.forRoot({
      pinoHttp: {
        logger,
        autoLogging: true,
        serializers: {
          err: pino.stdSerializers.err,
          req: r => {
            return {
              id: r.id,
              method: r.method,
              url: r.url,
            };
          },
          res: pino.stdSerializers.res,
        }
      },
    }),
  ],
  controllers: [AppController],
  providers: [AppService],
})
export class AppModule {}

and

// main.ts
import { NestFactory } from '@nestjs/core';
import { Logger } from 'nestjs-pino';
import { AppModule } from './app.module';

async function bootstrap() {
  const app = await NestFactory.create(AppModule, { logger: false });
  app.useLogger(app.get(Logger));
  await app.listen(3000);
}
bootstrap();

But the logging output missed the system logging part.

> nest start --watch
[10:11:49 PM] Starting compilation in watch mode...

[10:11:53 PM] Found 0 errors. Watching for file changes.

{"level":30,"time":1604671913986,"pid":28435,"hostname":"2070iMac","context":"RoutesResolver","msg":"AppController {}:"}
{"level":30,"time":1604671913987,"pid":28435,"hostname":"2070iMac","context":"RouterExplorer","msg":"Mapped {, GET} route"}
{"level":30,"time":1604671913989,"pid":28435,"hostname":"2070iMac","context":"NestApplication","msg":"Nest application successfully started"}

It is expected to output as many as system logging output, which has logging form modules like NestFactory and InstanceLoader. Below is the output from the default logger.

[10:33:59 PM] Starting compilation in watch mode...

[10:34:00 PM] Found 0 errors. Watching for file changes.

[Nest] 30928   - 11/06/2020, 10:34:01 PM   [NestFactory] Starting Nest application...
[Nest] 30928   - 11/06/2020, 10:34:01 PM   [InstanceLoader] LoggerModule dependencies initialized +15ms
[Nest] 30928   - 11/06/2020, 10:34:01 PM   [InstanceLoader] LoggerCoreModule dependencies initialized +1ms
[Nest] 30928   - 11/06/2020, 10:34:01 PM   [InstanceLoader] AppModule dependencies initialized +0ms
[Nest] 30928   - 11/06/2020, 10:34:01 PM   [RoutesResolver] AppController {}: +6ms
[Nest] 30928   - 11/06/2020, 10:34:01 PM   [RouterExplorer] Mapped {, GET} route +1ms
[Nest] 30928   - 11/06/2020, 10:34:01 PM   [NestApplication] Nest application successfully started +4ms

Here are some sample code to reproduce this issue: https://github.com/wuminqi/example-pino-nestjs

Can you kindly offer a help on this?

Thanks.