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/**
* These abstractions rely on NodeJS's cluster module, which allows a parent (master) process to share
* code with its children (workers). A simple `isMaster` flag indicates who is trying to access
* the code, and thus determines the functionality that actually gets invoked (checked by the caller, not internally).
*
* Think of the master thread as a factory, and the workers as the helpers that actually run the server.
*
* So, when we run `npm start`, given the appropriate check, initializeMaster() is called in the parent process
* This will spawn off its own child process (by default, mirrors the execution path of its parent),
* in which initializeWorker() is invoked.
*/
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