docs: add logo

Author: jbl428

README.md

@@ -1,3 +1,7 @@
+<p align="center">
+  <a href="http://nestjs.com"><img src="https://nestjs.com/img/logo_text.svg" alt="Nest Logo" width="320" /></a>
+</p>
+
 # nest-http-interface
 
 [![npm version](https://badge.fury.io/js/@r2don%2Fnest-http-interface.svg)](https://badge.fury.io/js/@r2don%2Fnest-http-interface)