Convert @marifse's Platforms/IBM PR into a blog post

[nate-double-u]

In the same vein as the other "Platforms" blog post issues (#396, #397, #398), work with @marifse to convert their "added ibm doc" PR (https://github.com/etcd-io/etcd/pull/12668) into a blog post.

This is a part of the discussion around "How to" type content (https://github.com/etcd-io/etcd/pull/12668#issuecomment-779665473)

[Somoshree]

/assign