Add documentation for setting up radical environment variables

[lee212]

We might consider using Google Form to manage user requests manually. New user input sends a notification and radical team reviews the request and provide the information, for example, https://docs.google.com/forms/d/1SAA4ye7UbWrDH-hVMCHVzp22UrYmfy05ZV_a9Gn7xCs/edit

[braceal]

That sounds like a good option. Unfortunately I'm unable to access that link. It says I need permission.