added traefik tool to 'HTTP(s) Services' chapter

README.md

@@ -574,6 +574,7 @@ performance of any of your sites from across the globe.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://nginx.org/"><b>Nginx</b></a> - open source web and reverse proxy server that is similar to Apache, but very light weight.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/alibaba/tengine"><b>Tengine</b></a> - a distribution of Nginx with some advanced features.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.haproxy.org/"><b>HAProxy</b></a> - the reliable, high performance TCP/HTTP load balancer.<br>
+&nbsp;&nbsp;:small_orange_diamond: <a href="https://traefik.io/"><b>Traefik</b></a> - open source reverse proxy / load balancer provides easier integration with Docker and Let's encrypt.<br>
 </p>
 
 ##### :black_small_square: DNS Services