Updated author info

Also I just realized that the images in here might not work if we don't have original files in the directory. Is this true, @kylemathews?

docs/blog/2018-1-18-strapi-and-gatsby/index.md

@@ -1,9 +1,7 @@
 ---
 title: "Building a static blog using Gatsby and Strapi"
 date: "2018-01-18"
-image: "toa-heftiba-274947.jpg"
 author: "Pierre Burgy"
-excerpt: "How to build a site using Gatsby and Strapi, a cross between a Node.js framework and a CMS"
 --- 
 
 ## Introduction
@@ -499,4 +497,4 @@ When your project is achieved, you will probably want to deploy it. The static w
 
 The [code source of this tutorial is available on GitHub](https://github.com/strapi/strapi-examples/tree/master/gatsby-strapi-tutorial). To see it live, clone the repository, run `npm run setup`, start the Strapi server (`cd api && strapi start`) and the Gatsby server (`cd blog && npm run develop`).
 
-We hope you enjoyed this tutorial. Feel free to comment on it, share it, and let us know how you create sites built with React and manage their content.
+We hope you enjoyed this tutorial. Feel free to comment on it, share it, and let us know how you create sites built with React and manage their content.