feat: support LOG_CONFIG environment variable
This variable allows users to override the logging.conf used for Python logging configuration. By default, this is set to $aurwebdir/logging.conf, which is a production config.
This patch allows us to specify the logging config as opposed to copying over logging.conf in our test docker and gitlab test scripts, as well as ease-of-testing as a developer.
Signed-off-by: Kevin Morris kevr@0cost.org