open in browser but only once

[Miguel Palau]

I think here it'd good to use the open command from react-dev-tools to just open the browser once (like what create-react-app) since it does that but fallsback to opn if you're not on chrome on a mac...

https://github.com/facebookincubator/create-react-app/tree/master/packages/react-dev-utils#openbrowserurl-string-boolean.

Here's how they do it:

https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/scripts/start.js#L85

lmk i could send a PR to help 😄

[John Otander]

I think that'd be a great addition to improve the experience. We'd be happy to accept a PR for this if you wanted to lend a hand 💙 .

[Miguel Palau]

sure thing 😄 i just wanted to get an ok in an issue first before doing that work haha, i'll get it done today

[Miguel Palau]

Ready for you to check/merge #24