personal info included

Signed-off-by: Nitishkumar Singh <nitishkumarsingh71@gmail.com>

Author: nitishkumar71

_staff_members/nitishkumar.md

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+---
+name: Nitishkumar Singh
+position: arkade developer
+image_path: /images/author/nitishkumar.png
+twitter_username: Nitishkumar071
+github_username: nitishkumar71
+linkedin_username: nitishkumarsingh71
+webpage: https://blog.nitishkumarsingh.xyz/
+blurb: Devops enthusiast. Senior Software engineer at <a href="https://www.here.com">@heremaps</a>
+---