Create a configuration checklist with references.

[delucchi-cmu]

Change Description

Creates a new page with additional steps that a user should perform outside their main source code tree (and often outside of github).

Part of issue #406

Checklist

• This PR is meant for the lincc-frameworks/python-project-template repo and not a downstream one instead.
• This change is linked to an open issue
• This change includes integration testing, or is small enough to be covered by existing tests

[drewoldag]

Looks great, thank you!