initializeEnvironmentVariables(env) {
		// Recognize that global data `eleventy.version` is coerced to remove prerelease tags
		// and this is the raw version (3.0.0 versus 3.0.0-alpha.6).
		// `eleventy.env.version` does not yet exist (unnecessary)
		process.env.ELEVENTY_VERSION = Eleventy.getVersion();

		process.env.ELEVENTY_ROOT = env.root;
		debug("Setting process.env.ELEVENTY_ROOT: %o", env.root);

		process.env.ELEVENTY_SOURCE = env.source;
		process.env.ELEVENTY_RUN_MODE = env.runMode;
	}
Set process.ENV variables for use in Eleventy projects

@method