add first portuguese Next.js course (#10212)

books/free-programming-books-pt_BR.md

@@ -36,6 +36,7 @@
     * [jQuery](#jquery)
     * [Knockout.js](#knockoutjs)
     * [Meteor](#meteor)
+    * [Next.js](#nextjs)
     * [Node.js](#nodejs)
     * [React](#react)
     * [Vue.js](#vuejs)
@@ -300,6 +301,11 @@
 * [Tudo sobre Meteor](https://udgwebdev.github.io/meteor/)
 
 
+#### Next.js
+
+* [O manual do Next.js para iniciantes](https://www.freecodecamp.org/portuguese/news/o-manual-do-next-js-para-iniciantes/) - freeCodeCamp
+
+
 #### Node.js
 
 * [Aplicações web real-time com Node.js](https://github.com/caio-ribeiro-pereira/livro-nodejs) - Caio Ribeiro Pereira