Enhance JSON decoding process

[atc0005]

Alex Edward's, "How to Prase a JSON Request Body in Go" article covers a number of solid, best-practice items that I should incorporate into this project.

https://www.alexedwards.net/blog/how-to-properly-parse-a-json-request-body

I've already implemented much (if not all) of them into the atc0005/bounce project, but evidently have not ported that code to this project yet.