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README.md

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 `mongo-leader` is a Node.js package for leader election backed by MongoDB. It is inspired by the [redis-leader](https://github.com/pierreinglebert/redis-leader) library. The main class `Leader` extends the Node.js [EventEmmiter](https://nodejs.org/api/events.html#events_class_eventemitter) class, allowing instances to emit events when they gain or lose leadership status. This makes it a powerful tool for managing distributed systems where only one instance should be in control at any given time.