docs(recipe): fastify example (#510)

Author: chimurai

README.md

@@ -500,6 +500,7 @@ View the [recipes](https://github.com/chimurai/http-proxy-middleware/tree/master
 
 - [connect](https://www.npmjs.com/package/connect)
 - [express](https://www.npmjs.com/package/express)
+- [fastify](https://www.npmjs.com/package/fastify)
 - [browser-sync](https://www.npmjs.com/package/browser-sync)
 - [lite-server](https://www.npmjs.com/package/lite-server)
 - [polka](https://github.com/lukeed/polka)

recipes/servers.md

@@ -9,6 +9,7 @@ Missing a server? Feel free to extend this list of examples.
 - [Browser-Sync](#browser-sync)
 - [Express](#express)
 - [Connect](#connect)
+- [fastify](#fastify)
 - [lite-server](#lite-server)
 - [Polka](#polka)
 - [grunt-contrib-connect](#grunt-contrib-connect)
@@ -83,6 +84,33 @@ app.use(apiProxy);
 http.createServer(app).listen(3000);
 ```
 
+## fastify
+
+https://github.com/fastify/fastify [![GitHub stars](https://img.shields.io/github/stars/fastify/fastify.svg?style=social&label=Star)](https://github.com/lukeed/polka)
+
+```javascript
+const fastify = require('fastify')({ logger: true });
+const { createProxyMiddleware } = require('http-proxy-middleware');
+
+(async () => {
+  await fastify.register(require('fastify-express'));
+
+  const proxy = createProxyMiddleware({
+    target: 'http://jsonplaceholder.typicode.com',
+    changeOrigin: true,
+  });
+
+  fastify.use(proxy);
+
+  fastify.listen(3000, (err, address) => {
+    if (err) throw err;
+    fastify.log.info(`server listening on ${address}`);
+  });
+})();
+
+// curl http://localhost:3000/users
+```
+
 ## lite-server
 
 https://github.com/johnpapa/lite-server