I'd like to understand why this question was marked as off topic so that I avoid asking similar inappropriate questions again in the future.
The question was closed for lack of research. In other words, the community wanted you to be more specific about what official resources you already consulted before you posted the question. That's to make sure we don't cover the same ground and also to help us understand what kind of answer you are looking for.
That aside, I think it's a fine question and should actually have been closed as a duplicate of a canonical question about hyphenating word compounds, which has a bunch of really interesting information in it. Which I would do, except I can't find the question I'm thinking of.
Anyway, welcome to EL&U!