@girish After thinking about this a bit more, it seems the optimal solution for "developer apps" isn't a published app, but some git repos of a few starter custom apps (dockerfile + ldap login + config instructions for a database if needed) specifically.
I know all the published cloudron app repos can be viewed (as linked in the packaging tutorial). Perhaps that is sufficient.
I'm building what is effectively a cloudron mashup (tying multiple apps together, LDAP, + private dns so API calls are local).
I'll provide further feedback if the current tutorial materials seem insufficient.