Vector-Green/nest-fastify-notFoundException-sendFile-bug

How to sendFile in NotFoundException using fastify

I'm using @fastify/static so I could use sendFile in reply of fastify and that works perfect with Controller like (I should return cause without return files are sending empty)

@Controller()
export class AppController {
  @Get('file')
  getFileTest(@Res() res: FastifyReply) {
    return res.sendFile('index.html');
  }
}

but the problem is I need to sendFile in an exception (and all files are sending empty no matter with return or without) (that works with express and not with fastify)

import {
  ExceptionFilter,
  Catch,
  NotFoundException,
  ArgumentsHost,
} from '@nestjs/common';

import { FastifyReply } from 'fastify';

@Catch(NotFoundException)
export class NotFoundExceptionFilter implements ExceptionFilter {
  catch(exception: NotFoundException, host: ArgumentsHost) {
    const response = host.switchToHttp().getResponse<FastifyReply>();
    return response.status(200).sendFile('index.html');
    //response.status(200).send('text'); //works fine express and fastify
  }
}

are there ways to sendFile from and @Catch(NotFoundException)?

route "/" returns index.html

route "file" returns index.html

any else routes are returning empty index.html

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