No amount of searching as revealed the correct and complete steps for creating a phonegap build app from a simple react-redux app.
Surely it is a common problem - one has a very simple react-redux website that makes ajax calls to only one source and may access some CDNs.
For a start, only android is necessary.
a) What does the complete config.xml look like?
The phonegap build documentation gives no insight here.
b) How does the react application need to be changed?
c) How does the debugger work - clicking on debug after installing doesn't seem to offer any meaningful actions.