themes.json greeter.json - Required, not documented, not in Docker image

[FiyaFly]

This would be resolved by the completion of issue #15 as well, but as I was testing this out to see how it feels, it took me a little bit to discover that a greeter.json file and a themes.json file are required in the data directory, but I could find no documentation (i.e. nothing noted in the README) on this requirement, and no example of the greeter.json file as well. If I launch the generated site missing either of these files in the data directory, it just comes up blank for me.

I just wanted to make a note of this for you as I was passing through. I found my way and got it working, so there isn't really any required actions for this, but it might be beneficial to make a note on this in the Readme for others after me. Thanks for the project! If it suits my needs, you might find me back to contribute how I can!