doc: add code example to http.createServer method

doc/api/http.md

@@ -2693,6 +2693,37 @@ Returns a new instance of [`http.Server`][].
 The `requestListener` is a function which is automatically
 added to the [`'request'`][] event.
 
+```cjs
+const http = require('http');
+
+// Create a local server to receive data from
+const server = http.createServer((req, res) => {
+  res.writeHead(200, { 'Content-Type': 'application/json' });
+  res.end(JSON.stringify({
+    data: 'Hello World!'
+  }));
+});
+
+server.listen(8000);
+```
+
+```cjs
+const http = require('http');
+
+// Create a local server to receive data from
+const server = http.createServer();
+
+// Listen to the request event
+server.on('request', (request, res) => {
+  res.writeHead(200, { 'Content-Type': 'application/json' });
+  res.end(JSON.stringify({
+    data: 'Hello World!'
+  }));
+});
+
+server.listen(8000);
+```
+
 ## `http.get(options[, callback])`
 ## `http.get(url[, options][, callback])`
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