Add option to switch to Fastify

I’m submitting a…

[ ] Regression 
[ ] Bug report
[x] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

Expected behavior

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

Better cold-start times when running in serverless environment

Environment

Nest version: X.Y.Z

 
For Tooling issues:
- Node version: XX  
- Platform:  

Others:

[neilime]

I’ve tried to use fastify as explained in https://docs.nestjs.com/techniques/performance, wihout success :

Always get an error “[PackageLoader] The “fastify” package is missing. Please, make sure to install this library ($ npm install fastify) to take advantage of FastifyAdapter.”

Even if I manually load fastify package in main.ts. Examples:

• const fastify = require('fastify');
• import fastify from 'fastify';
• …

Maybe it will be usefull to be able to pass the fastify instance to the adapter :

const fastify = require('fastify');

enableProdMode();

async function bootstrap() {
  const app = await NestFactory.create(ApplicationModule, new FastifyAdapter({
    instance: fastify
  }));
  app.enableCors({
    methods: 'GET',
    maxAge: 3600,
  });
  await app.listen(4000);
}
bootstrap().catch(err => console.error(err));

[Sikora00]

@invaderb no I haven’t. I don’t think I could handle maintenance by myself.