Add example Boxpiper blog

Author: sanmak

src/site/_data/examples/boxpiper.yaml

@@ -0,0 +1,15 @@
+title: BoxPiper
+description: Blog of Tech, Product, Money, Books, Life. Box Piper to serve faster, easier and superior knowledge.
+link: "https://boxpiper.com/"
+thumbnailurl: /img/examples/boxpiper.png
+tools:
+  - Gatsby.js
+  - Netlify
+  - GitHub
+  - React
+  - Sass
+  - MDX
+  - React
+  - MailChimp
+  - Google Analytics
+  - Visual Studio