add bugtrackers.io to hugo docs showcases

docs/content/showcase/bugtrackers.io.md

@@ -0,0 +1,12 @@
+---
+date: 2015-10-27T09:02:00Z
+description: bugtrackers.io provides stories of digital crafters. It shows people behind bits, pixels and bug reports. bugtrackers.io is your resource for web development.
+sitelink: https://www.bugtrackers.io/
+tags:
+- blog
+- community
+- interviews
+thumbnail: /img/bugtrackersio-tn.jpg
+title: bugtrackers.io
+---
+