Feature: Add to the AppHost an extension <!-- This issue will be created in repo mpaulosky/IssueTracker (https://github.com/mpaulosky/IssueTracker). Changing this line has no effect. -->

[mpaulosky]

In the AppHost lets create an extension that:

• Registers the MongoDB database.
• Creates a Dashboard command that allow clearing the data or dropping the database to allow add new data.