How do I use Phonegap in BEEF?

I've just started using beef with linode and I'm having trouble understanding how to use the phonegap social engineering module.
I've done some research and noticed that phonegap is no longer active. People have suggested flutter or other alternatives, but I'm not sure how to make modules using these alternatives.

How have others managed to substitute phonegap? I'd love to see examples of what is possible.