Some content already exists for this section in the Getting Started Guide - https://finp.github.io/aerogear/latest/getting-started.html#registering

There is also a JIRA for adding a screenshot to this section: https://issues.jboss.org/browse/AEROGEAR-3510

Ideally, we would share this section between Getting Started and Mobile Client, so some co-ordination with the person working on 3510 should help here.

No need to talk about deleting a mobile client in this section - it's the same as deleting anything else in OpenShift.
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