Hello, I'm the maintainer of the piler project. Since this topic is 2+ years old, I'm not sure, if there's an interest to have piler as a cloudron app. Anyway, the application is already dockerized, see https://bitbucket.org/jsuto/piler/src/master/docker/ for more.
Basically it's a 3 container setup having mysql, memcached and piler. I believe that it can be customized to run on cloudron.