add real world examples page

www/content/docs/real-world-examples.mdx

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+---
+title: Real World Examples
+description: See how real open source projects are using multi tenancy. 
+---
+<span className="text-sm text-muted-foreground">
+These projects are a mix of ones that use Tenant Kit and ones that don't, but all of them are multi tenanted in some way.  They should
+be a helpful reference for seeing how multi tenancy is used in real world applications.
+</span>
+
+### Dub.co
+
+Dub.co allows users to bring their own domains for shortened links.
+
+![dubco-domain](/images/dubco-domain.png)
+
+Check out their [source code on GitHub](https://github.com/dubinc/dub) to learn how 
+
+
+---
+### Answer Overflow
+
+Answer Overflow allows users to host content on their own domains. Along with this, it supports cross domain auth with NextAuth.
+
+![answer-overflow](/images/ao-domain.png)
+
+Check out their [source code on GitHub](https://github.com/answer-overflow/answer-overflow).
+
+
+---
+
+### Discourse
+
+Discourse is a mature app with thousands of multi tenant users. While Tenant Kit is more focused on the TypeScript/React ecosystem,
+Discourse is a great reference for how to implement multi tenancy in Ruby on Rails. Along with this, they have excellent documentation
+for their customers to use on how to configure their domains.
+
+Check out their [source code on GitHub](https://github.com/discourse/discourse).
+
+---
+
+Know of more projects that are open source and multi tenant? [Create a pull request](https://github.com/rhyssullivan/tenant-kit) to add them to the list!