This is a sub-command GIT repository called app2
Implementation module for sub-command app2 is namespace_demo.app2
Note 1: We have namespace_demo.main_app2.py to wrap CLI. We are not overwriting base module namespace_demo.main.
Note 2: main cli is still from base module demo-cli = "namespace_demo.main_app2:cli" so that app2 is available as sub-command