Essay proposal: BDD in DevOps (#1032)

contributions/essay/agnespet/README.md

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+# Essay Proposal 
+I want to write an essay about why to (and how to) use BDD(Behaviour Driven development) in DevOps.
+The essay will cover:
+- DevOps testing (The testing hourglass)
+- What BDD is (short on how it evolved)
+- How BDD can improve devOps projects 
+- The 3 amigos (who should use BDD)
+- BDD tools and practices to use and follow
+
+## Members
+Agnes Petäjävaara <agnespet@kth.se> [anorangesky](https://github.com/anorangesky)