Snapcraft create python-flask+nginx+gunicorn app

Hi,
is it possible to put my app from multiple packages like python + all his requirements from .txt + gunicorn + nginx in one snap package? If not what the reason of such tool?

I didn’t see any good examples in docs, could anybody show example for such snap package? for flask web app + gunicorn + nginx?
thx

While this is rather old (and i have not updated it in a while), here is a snap that combines minidlna, lighttpd and sqlite into one snap, perhaps that gives you some hints: