Ask HN: Best update strategy python application on beaglebone?

For the moment I've created an Python web application running on uwsgi with a frontend created in EmberJS. There is also a small python script running that is controlling I/O and serial ports connected to the beaglebone black. The system is running on debian, packages are managed and installed via ansible, the applications are updated also via some ansible scripts. With other words, updates are for the moment done by manual work launching the ansible scripts over ssh. I'm searching now a strategy/method to update my python applications in an easy way and that can also be done by our clients (ex: via webinterface). A good example is the update of a router firmware. I'm wondering how I can use a similar strategy for my python applications. I checked Yocto where I can build my own linux with but I don't see how to include my applications in those builds, and I don't wont to build a complete image in case of hotfixes. Anyone who has a similar project and that would like to share with me some useful information to handle some upgrade strategies/methods?