Hint to create an excel

sample_excel.ts

import { Injectable } from '@nestjs/common';
import * as ExcelJS from "exceljs";


@Injectable()
export class AppService {
  getHello(): string {
    let wb = new ExcelJS.Workbook();
    let ws = wb.addWorksheet("sample_worksheet");
    ws.columns = [
      { header: 'Id', key: 'id', width: 10 },
      { header: 'Name', key: 'name', width: 25}
    ];
    ws.addRows([[1, "Bla1"], [2, "Bla2"]]);
    
    const filename = 'output.xlsx';
    wb.xlsx.writeFile(filename).then(() => {
      console.log(`Congrats! File ${filename} has beed created succesfully!`);
    }).catch((error) => {
      console.error('Error creating file: ', error);
    })
    return 'Hello World!';
  }
}