How to build a portfolio using Gatsby - part 1

Hey Dan,

I've started setting up the Portfolio based on your user guide. It's very very detailed. So thank you for that!

Quick things I think you'll need to correct in your article:

1. When you had configured the port to run on 9090, then I think the server would be running on localhost:9090 and not on localhost:8000 as you had indicated in your article above.
2. touch gatsby.config.js needs to corrected to touch gatsby-config.js.

If there are other things, I'll mention it as I go through them. Thank you!