Add portuguese (brazil) version of "Build Web Application with Golang" (#10406)

* Add portuguese (brazil) version of  "Build Web Application with Golang"

* remove github beside author

Co-authored-by: Eric Hellman <eric@hellman.net>

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Co-authored-by: Eric Hellman <eric@hellman.net>

books/free-programming-books-pt_BR.md

@@ -209,6 +209,7 @@
 ### GO
 
 * [Aprenda Go com Testes](https://larien.gitbook.io/aprenda-go-com-testes) - Lauren Ferreira
+* [Construindo Aplicações Web em Golang](https://astaxie.gitbooks.io/build-web-application-with-golang/content/pt-br/) - astaxie
 * [Go - hands on](https://github.com/go-br/estudos)
 * [Go Lang - A linguagem do Google](https://www.ime.usp.br/~gold/cursos/2015/MAC5742/reports/GoLang.pdf) - Suelen Goularte Carvalho (PDF)
 * [Go por Exemplo](http://goporexemplo.golangbr.org) - Mark McGranaghan, Jeremy Ashkenas, golangbr, Daniela Tamy Iwassa (HTML)