Closes #569 Add port process conflict resolution and Chalk

[vinnymac]

I tested this out, it seems to work great, but I had to add someone else's repo as a dependency because the getProcessForPort method hasn't been pushed to the officially available react-dev-utils package on npm.

I also added some chalk here and there.

If you want me to change the wording or add the dependency a different way let me know 👍

[KyleAMathews]

Awesome!

Could you add some screenshots?

Since this isn't much code — how about you just copy/paste the necessary code into Gatsby for now and then in a follow-up PR we use react-dev-utils once the function is published?

[vinnymac]

Okay I'll bring it over from react-dev-utils then. I'll see if I can get any good screenshots as well👍

[vinnymac]

I brought the source in and fixed the lint issues that came with it. I also made the formatting look prettier. Here are some screenshots of the changes. Would you like me to put them somewhere?

[KyleAMathews]

Nah — just wanted screenshots to document here the changes you were making. Looks great. Once the tests finish running, I'll merge the changes and make a quick release.

Thanks! This is a really nice little UX improvement.

[KyleAMathews]

Released in 0.12.20 https://github.com/gatsbyjs/gatsby/releases/tag/v0.12.20

[jlengstorf]

Hiya @vinnymac! 👋

This is definitely late, but on behalf of the entire Gatsby community, I wanted to say thank you for being here.

Gatsby is built by awesome people like you. Let us say “thanks” in two ways:

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Thanks again! 💪💜