add Code:Nation

add https://www.codenation.com.br/

README.md

@@ -23,6 +23,7 @@ Here some ideias of projects, challenges and coding interviews for you to practi
 - [Apenas Crie Websites](https://github.com/estevanmaito/apenas-crie-websites) :brazil:
 - [Challenger.js](http://rileyjshaw.com/challenger/) :us:
 - [CodeEval](https://www.codeeval.com/) :us:
+- [Code:Nation](https://www.codenation.com.br/) :brazil:
 - [Coderbyte](https://coderbyte.com/) :us:
 - [Daily UI](http://www.dailyui.co/) :us:
 - [Exercism](http://exercism.io/) :us:
@@ -42,6 +43,7 @@ Here some ideias of projects, challenges and coding interviews for you to practi
 - [URI Online Judge](https://www.urionlinejudge.com.br/) :brazil:/:us:/:es:
 - [UVA](https://uva.onlinejudge.org/) :us:
 
+
 #### CSS
 - [100dayscss](https://100dayscss.com/) :us:
 - [Daily CSS Images](http://dailycssimages.com/) :us: