What is a good pattern for creating configuration at system-start (IE configuration that can't be created statically, and doesn't require side-effects, as components normally do)
http://stackoverflow.com/questions/40681456/in-component-whats-the-best-pattern-for-creating-configuration-at-system-start
Just read it in, inside your start function.
Then assoc it into your component.
or read it in before calling start and use the configuration data to decide how to construct the system.