Add description of the repo

Change-Id: I34312972ff22254382ce9c44790c1746c6001bcd
Related-PROD: PROD-24883 (PROD:24883)
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+# CVP Shaker
+
+Docker source files for building an image to be used with the corresponding [CVP Shaker Jenkins pipeline](https://github.com/Mirantis/mk-pipelines/blob/master/cvp-shaker.groovy).
+