in hq/app/config/Config.scala [46:52]
def getStage(config: Configuration): Stage = {
config.getAndValidate("stage", Set("DEV", "PROD")) match {
case "DEV" => DEV
case "PROD" => PROD
case _ => throw config.reportError("stage", s"Missing application stage, expected one of DEV, PROD")
}
}