Fix setup/teardown logging

[angela-tran]

After #128 was merged in, the setup and teardown scripts are no longer showing log statements in the console:

Additional context

This has to do with logger hierarchy. In #116, we were setting the log level and handler for the root logger. The intent in #128 was to:

• introduce a configurable setting for the log level
• simplify the configuration code (avoid adding/removing redundant handlers)

I thought configuring directly on the app.logger instance would be equivalent to our previous setup, but I see now that's not true.

This bug points out that we should revisit the organization of our scripts and where they get their Logger. This might have some overlap with #131.

Resources

https://docs.python.org/3/howto/logging.html#advanced-logging-tutorial