Add CLA and write a FAQ about the chosen license

A lot of people in Discord have raised that the chosen license (elastic) is a bit scary. I think a FAQ in the readme should address common questions and a CLA (Contributor License Agreement) should be required before the first contribution of a person. I've gathered some questions: - Can I host a CADmium instance for my family? - Can I host a CADmium instance for my company for internal use? - Can I host a CADmium instance for my company for my clients as a free service? - Can I host a CADmium instance for my company for my clients as a paid service? - If you choose at some point to stop developing CADmium, what will/can happen to the project? - If I fork the project and change it (rebranding or adding a new feature) can I host it myself? - Do I have to publish my fork?