Create-react-app: Allow using a port other than 3000

[dceddia]

I tried a search for "port"-related issues but didn't find any, so I'll make this one.

It would be nice to be able to specify a port other than 3000, either as a command line parameter or an environment variable. Some environments (Cloud9) restrict the ports you can use.

Right now, the process is pretty involved:

1. Run "npm run eject"
2. Wait for that to finish
3. Edit "scripts/start.js" and find/replace "3000" with whatever port you want to use
4. Edit "config/webpack.config.dev.js" and do the same
5. npm start

[Jiansen]

It is discuss in #101 , and there is a relevant PR #243

Do you want to close this issue if your question has been addressed?

[dceddia]

I'll close this, it looks like the discussion near the end of #102 is heading in this direction.

101 and #243 don't address quite the same question. I'm not wondering how to override the port when the port is in use, but how to choose a port other than 3000 from the get-go.

[gaearon]

We default to PORT from environment now if it is specified. Please try the new alpha: https://github.com/facebookincubator/create-react-app/pull/190

[dceddia]

Awesome, thanks! PORT=xyz npm start is working in the alpha.

[gaearon]

Released as stable.