Adds unit tests, using Jest. I used Gatsby's unit test docs to get it going for now and will add more later.
Locally, I initially setup the blog using the Gatsby's tutorial: https://www.gatsbyjs.org/tutorial/part-seven/, but wanted something a bit more ready to go. However, keeping this tutorial link around as reference in case I want to look back at my learnings.
This PR...
Locally, I initially setup the blog using the Gatsby's tutorial: https://www.gatsbyjs.org/tutorial/part-seven/, but wanted something a bit more ready to go. However, keeping this tutorial link around as reference in case I want to look back at my learnings.