Feature request: Logger

[MickL]

Every "big" framework provide a logger (e.g. NestJS and AdonisJS.

To me personally I would be happy to be able to log to console, e.g. with consola, but I know a lot of people also need to log to files, or maybe use external logging services.

Needed features

• Set log level (in nitro.config.ts?) depending on environment, e.g. verbose on dev, only warn/error on prod
• Provide a context, e.g. in route /checkout it could be const logger = useLogger('checkout') and then the context is always prefixed

[MickL]

What makes Nitro so powerful is that on one hand it is very flexible but on the other there is already the huge UnJS ecosystem. Therefor this feature request can already be solved by adding a simple example to the docs how to create a logger, e.g.:

bun add consola

import { createConsola } from 'consola';
import type { ConsolaInstance } from 'consola/core';

let consola: ConsolaInstance;

export const useLogger = () => {
  if (!consola) {
    const { logLevel } = useRuntimeConfig();

    consola = createConsola({
      level: logLevel,
    });
  }

  return consola;
};

[cjpearson]

Having event.$log as suggested here would also be nice. #651 (comment)