Backbase Tech Stack article (#157)

* Backbase Tech Stack article

* Capitalization and sentence corrections

* Diagrams updates

* Fixes and adjustments based on @uesleilima suggestions

* GC Stack

* jolt, xslt in GC section

* Article directory has been renamed

* Syntax improvement

* HTML to MD syntax changed for embedded image

Author: pawel90g

content/authors/authors.json

@@ -115,8 +115,12 @@
     "avatar": "sriramg.png",
     "role": "Principal System Engineer - Customer Success"
   },
+  "Paweł Garbacik": {
+    "avatar": "pawelg.png",
+    "role": "Solution Architect - Customer Success"
+  },
   "Backbase Meetups": {
     "avatar": "backbase.png",
     "role": "Meetup Organizer"
   }
-}
+}