Add a NOTES.txt message for adminHash and adminPassword both being set

[colearendt]

Is your feature request related to a problem? Please describe.
If you haven't interacted with the service in a while, it's easy to forget how adminHash and adminPassword values interact.

Describe the solution you'd like
We can't put the mental model into the mind of users / administrators. However, it would be possible to add a NOTES.txt message if both are set, so that there is clear feedback on the difference between them / etc.

Describe alternatives you've considered
There may be something smart we can do about the values or documentation so that people do not get in this place. I know I have had issues in the past with charts such as postgresql and trying to figure out which values are being set and which are being ignored.

Another alternative would be to print out the command that can retrieve the password. This is a convention that I have noticed the postgresql chart (and others) uses.

Additional context
#74