Add official image for OpenSearch Dashboards

Signed-off-by: Rishabh Singh <sngri@amazon.com>

Author: rishabh6788

library/opensearch-dashboards

@@ -0,0 +1,11 @@
+Maintainers: OpenSearch Project Team <opensearch@amazon.com> (@opensearch-project),
+             Rishabh Singh <sngri@amazon.com> (@rishabh6788),
+             Peter Zhu <zhujiaxi@amazon.com> (@peterzhuamazon),
+             Prudhvi Godithi <pgodithi@amazon.com> (@prudhvigodithi)
+GitRepo: https://github.com/opensearch-project/dashboards-docker-images.git
+
+Tags: 2.3.0, 2.3, 2, latest
+Architectures: amd64, arm64v8
+GitCommit: c8f80771985daceb6dcbe9498790b2d848159786
+Directory: 2.x
+