docs: added cloud redis documentation (medusajs#12760)

* docs: added cloud redis documentation

* small fix

* add diagram

* small fixes

Author: shahednasser

www/apps/cloud/app/redis/page.mdx

@@ -0,0 +1,46 @@
+export const metadata = {
+  title: `Redis`,
+}
+
+# {metadata.title}
+
+In this guide, you'll learn about the managed Redis service that Cloud provides as part of your project environments.
+
+## Managed Redis Service
+
+Cloud offers a managed Redis service for your project environments. Each environment has its own dedicated Redis instance that is automatically provisioned when the environment is created.
+
+So, when you create a new project, Cloud creates a production Redis instance for the production environment. If you create a staging environment, Cloud creates a separate Redis instance for that environment as well.
+
+![Diagram showcasing Redis isolation between environments](https://res.cloudinary.com/dza7lstvk/image/upload/v1750230910/Cloud/redis-cloud_llg83c.jpg)
+
+---
+
+## Configured Redis Infrastructure Modules
+
+Cloud automatically configures your Medusa application to use Redis-based Infrastructure Modules, including:
+
+- [Redis Event Module](!resources!/infrastructure-modules/event/redis)
+- [Redis Cache Module](!resources!/infrastructure-modules/cache/redis)
+- [Redis Locking Module Provider](!resources!/infrastructure-modules/locking/redis)
+- [Redis Workflow Engine Module](!resources!/infrastructure-modules/workflow-engine/redis)
+
+So, you don't need to configure any of these modules and providers or set up Redis manually. Also, if you have them configured in `medusa-config.ts`, remove them to avoid conflicts.
+
+<Note>
+
+If you're using a Medusa version before v2.7.0, [contact support](#) for assistance in configuring the Redis modules.
+
+</Note>
+
+### Override Redis Configurations
+
+If you need to customize the Redis configurations for any of the Redis modules and providers, you must host and manage your own Redis instance externally.
+
+Then, configure the modules and providers you're overriding in your `medusa-config.ts` file to connect to your external Redis instance. Refer to the documentation for each module for more details on how to configure it.
+
+<Note title="Tip">
+
+To set the connection URL of your external Redis instance, refer to the [Environments](../environments/page.mdx#add-environment-variables) guide to learn how to add environment variables. You can then use these variables in your `medusa-config.ts` file to connect to your Redis instance.
+
+</Note>

www/apps/cloud/generated/edit-dates.mjs

@@ -6,5 +6,6 @@ export const generatedEditDates = {
   "app/deployments/page.mdx": "2025-06-17T11:17:03.236Z",
   "app/organizations/page.mdx": "2025-06-17T10:48:50.969Z",
   "app/notifications/page.mdx": "2025-06-17T12:29:18.819Z",
-  "app/database/page.mdx": "2025-06-17T14:34:57.104Z"
+  "app/database/page.mdx": "2025-06-17T14:34:57.104Z",
+  "app/redis/page.mdx": "2025-06-18T06:50:30.705Z"
 }

www/apps/cloud/generated/sidebar.mjs

@@ -69,6 +69,14 @@ export const generatedSidebars = [
             "title": "Database",
             "path": "/database",
             "children": []
+          },
+          {
+            "loaded": true,
+            "isPathHref": true,
+            "type": "link",
+            "title": "Redis",
+            "path": "/redis",
+            "children": []
           }
         ]
       },

www/apps/cloud/sidebar.mjs

@@ -49,6 +49,11 @@ export const sidebar = [
             title: "Database",
             path: "/database",
           },
+          {
+            type: "link",
+            title: "Redis",
+            path: "/redis",
+          },
         ],
       },
       {