se creo el servicio para guardar participantes

src/app.module.ts

@@ -1,11 +1,35 @@
 import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { ConfigModule, ConfigService } from '@nestjs/config'
 import { AppController } from './app.controller';
 import { AppService } from './app.service';
-import { eventsModule } from './events/events.module';
+import { EventosModule } from './eventos/eventos.module';
+import { ParticipanteController } from './participante/participante.controller';
+import { ParticipanteModule } from './participante/participante.module';
+import { EventoParticipanteModule } from './evento-participante/evento-participante/evento-participante.module';
 
 @Module({
-  imports: [eventsModule],
-  controllers: [AppController],
+  imports: [
+    ConfigModule.forRoot({isGlobal: true}),
+    TypeOrmModule.forRoot({
+    type: 'mariadb',
+    host: 'localhost',
+    port: 3306,
+    username:'root',
+    password: 'password',
+    database: 'cedetec_proyectos',
+    entities: [__dirname + '/**/*.entity{.ts,.js}'],
+    synchronize: true
+  }),
+    EventosModule,
+    ParticipanteModule,
+    EventoParticipanteModule],
+  controllers: [AppController, ParticipanteController],
   providers: [AppService],
 })
-export class AppModule {}
+export class AppModule {
+  static port: number
+  constructor(private readonly configService: ConfigService){
+    AppModule.port = this.configService.get('PORT')
+  }
+}