Moved different dashboards to their specific directories. Also
mentioned that these dashbards are examples of how to create
graphs using MinIO provided and metrics and customers should
change / add graphs on their specific need basis.
Signed-off-by: Shubhendu Ram Tripathi <shubhendu@minio.io>
Minio server supports healthcheck and prometheus related
unauthenticated endpoints. This document summarizes this
information in a single place and add links for more detailed
documentation if needed.