Automatically ask to run on next free port if port 3000 is busy

[Arrow7000]

Firstly thank you for this project! I tried to manually convert my CRA app to use TypeScript but it didn't work at all, so this is a lifesaver.

The original Create React App has a feature where if port 3000 is busy it will automatically ask if I want to run it on the next available port. This doesn't seem to be the case here because I just get this in the console

$ yarn start
yarn start v0.27.5
warning ..\..\package.json: No license field
$ react-scripts-ts start
Something is already running on port 3000.
Done in 2.28s.

Could this feature be added to this too?

[wmonk]

Think this should be covered by #104

[abenhamdine]

I don't see any difference with version 2.6.0, on Windows 10 64 bits (didn't try yet on linux).

I only get in the console :

$ yarn start
yarn start v0.27.5
$ react-scripts-ts start
Something is already running on port 3000.
Done in 2.22s.

For future Windows readers : one simple way to change the port used on Windows (eg to 3001) is to to create a .env file at the root of project, with the following line inside

PORT=3001

[alebrozzoSP]

I use VSCode on Win10 and this feature works fine, in the sense that it asks me if I want to run in port 3001 just as the non TS version.
I have c-r-a v1.4.0 installed globally, and typescript 2.5.2 also globally, and locally I use react 15.6.1 and react-scripts-ts 2.6.0
I hope this helps somehow :(