se modifico la base de datos y se agrego los excel

src/eventos/eventos.controller.ts

@@ -1,4 +1,5 @@
-import { Body, Controller, Delete, Get, Param, ParseIntPipe, Patch, Post } from '@nestjs/common';
+import { Body, Controller, Delete, Get, Param, ParseIntPipe, Patch, Post, Res } from '@nestjs/common';
+import { Response } from 'express';
 import { InjectRepository } from '@nestjs/typeorm';
 import { EventoParticipante } from 'src/evento-participante/evento-participante/eventoParticipante.entity';
 import { Repository } from 'typeorm';
@@ -46,4 +47,11 @@ export class EventosController {
     async getParticipnates(@Param('id', ParseIntPipe)id:number){
         return this.eventoService.getParticipantes(id)
     }
+
+    @Get(':id/exportExcel')
+    async exportarExcel (@Param('id', ParseIntPipe)id:number ,@Res() res: Response){
+        const filePath = await this.eventoService.exportarParticipantes(id);
+        res.download(filePath);
+    }
+
 }