3000 is used by Next.js and CRA by default, which means that ports will often clash in practice. Having said that, I don’t know what alternative number would be a clear winner.

Nice-looking ports like 6000, 9000 or 10000 are all used for something else, according to Wikipedia. Going for 30000 would require folks to count zeros and is therefore error-prone. Maybe 3030? 🤷

I don't think it will be common that people will run tools like Next.js and CRA and the same time as serve, but if they do, --listen <port> can be used for defining a custom one.

3000 as the new default sounds good to me!

Thank you!

My pleasure 😊

If you have a Docker Swarm mode cluster set up with traefik as a load balance to do wtv, don't forget to change alll your docker files that use serve default port in order to prevent Bad Gateway connection errors.

`
...
RUN yarn global add serve
...
CMD serve -s -p 5000 build
...

`