docs: add documentation for v1.8 (#3669)

docs/content/development/events/modules/local.md

@@ -0,0 +1,68 @@
+---
+description: 'In this document, you’ll learn about the local events module and how you can install it in your Medusa backend.'
+addHowToData: true
+---
+
+# Local Events Module
+
+In this document, you’ll learn about the local events module and how you can install it in your Medusa backend.
+
+## Overview
+
+Medusa’s modular architecture allows developers to extend or completely replace the logic used for events. You can create a custom module, or you can use the modules Medusa provides.
+
+One of these modules is the local events module. This module allows you to utilize Node EventEmitter for the events system in Medusa. The Node EventEmitter is limited to a single process environment. This module is useful for development and testing, but it’s recommended to use the [Redis events module](./redis.md) in production.
+
+This document will you guide you through installing the local events module.
+
+---
+
+## Prerequisites
+
+It’s assumed you already have a Medusa backend installed. If not, you can learn how to install it by following [this guide](../../backend/install.mdx).
+
+---
+
+## Step 1: Install the Module
+
+In the root directory of your Medusa backend, install the Redis events module with the following command:
+
+```bash npm2yarn
+npm install @medusajs/event-bus-local
+```
+
+---
+
+## Step 2: Add Configuration
+
+In `medusa-config.js`, add the following to the exported object:
+
+```js title=medusa-config.js
+module.exports = {
+  // ...
+  modules: {
+    // ...
+    eventBus: {
+      resolve: "@medusajs/event-bus-local",
+    },
+  },
+}
+```
+
+This registers the local events module as the main events service to use. This module does not require any options.
+
+---
+
+## Step 4: Test Module
+
+To test the module, run the following command to start the Medusa backend:
+
+```bash npm2yarn
+npm run start
+```
+
+If the module was installed successfully, you should see the following message in the logs:
+
+```bash noCopy noReport
+Local Event Bus installed. This is not recommended for production.
+```