Values can reference Variables by using their name (e.g. foo where foo is variable).
Values are treated as strings by default and cannot contain spaces (e.g. foobar123).
Values surrounded by " are treated as strings and can contain spaces (e.g. "foo bar").
Values surrounded by ` (backticks) are evaluated using JavaScript's eval function. This means you can use any valid JavaScript expression inside (e.g. `0.1 + 0.2`).
Values starting with file: are treated as file paths and the file's content is used as the value (e.g. file:foo.txt where foo.txt is a file relative to the preprocessed file.).
Values starting with url: are treated as URLs and the URL's content is used as the value (e.g. url:https://myapi.com/version).
Values starting with env: are treated as environment variables and the environment variable's value is used as the value (e.g. env:HOME).