main.ts

import { NestFactory } from '@nestjs/core';
import * as rateLimit from 'express-rate-limit';

import { AppModule } from './app.module';

/*
  Main.ts starts the server.
*/

// due to a bug with newest release of express-rate-limit, call for rateLimit is broken
// (rateLimit as any) works as a workaround for now
// see https://github.com/nfriedly/express-rate-limit/issues/138
const limiter = (rateLimit as any)({
  windowMs: 60 * 1000, // one minute
  max: 100, // limit each IP to 100 requests per windowMs
});

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  // Cors is needed for application/json POST
  app.enableCors();
  //  apply limiter to all routes
  app.use(limiter);
  await app.listen(5000);
}
bootstrap();