How to use the @nestjs/platform-express.MulterModule.register function in @nestjs/platform-express

import path from 'path';
import multr from 'multer';
import { Model } from 'mongoose';
import { Injectable, BadRequestException } from '@nestjs/common';
import { MulterModule } from '@nestjs/platform-express';
import { InjectModel } from '../../utils/model.util';
import { FileDocument, FileModel } from '../../models/file.model';
import { MediaDocument, MediaModel } from '../../models/media.model';
import { md5 } from '../../utils/crypto.util';
import { creteUploadFile } from '../../utils/upload.util';

MulterModule.register({
    storage: multr.memoryStorage(),
});

@Injectable()
export class UploadService {
    public constructor(
        @InjectModel(FileModel) private readonly fileModel: Model,
        @InjectModel(MediaModel) private readonly mediaModel: Model
    ) {}

    public async uploadSingalImage(file: Express.Multer.File) {
        // 实体数据
        const originalName = file.originalname;
        const mimetype: string = file.mimetype;
        const size = file.size;
        const suffix = path.extname(file.originalname);