Merge pull request stackblitz#86 from wakeupmh/feat/koa

feat: add Koa to supported frameworks

Author: EricSimons

Supported_frameworks.md

@@ -4,6 +4,7 @@ The following is a list of frameworks that we have actively tested and are suppo
 
 - [Next.js](https://stackblitz.com/fork/nextjs)
 - [NestJS](https://stackblitz.com/fork/nestjs-starter)
+- [Koa](https://stackblitz.com/edit/koa-starter)
 - [Nuxt](https://stackblitz.com/github/nuxt/starter/tree/stackblitz)
 
 ## Add support for a framework