Not sure if SE is the right place to ask, so checking first...
I am writing a web-based app for use in a private office (local network, no outside access). We have an agreement that they are not to sell the application on without my involvement.
I am concerned that the client may zip up the app files, including a database backup and sell them to someone else without telling me. I want some advice as to how to prevent this (if I can).
Is this on-topic for this site? If not, any suggestions as to where would be?