docker fast course in pt-br (#7138)

* adciionado curso de docker pt-br

* remove YT notes

Co-authored-by: francisco_wilcley <francisco.wilcley@grupobrisanet.com.br>
Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>

courses/free-courses-pt_BR.md

@@ -91,6 +91,7 @@
 ### Docker
 
 * [Curso de Docker Completo](https://www.youtube.com/playlist?list=PLg7nVxv7fa6dxsV1ftKI8FAm4YD6iZuI4) - Robert Silva (YouTube)
+* [Curso de Docker para iniciantes - aprenda Docker em 1 hora](https://www.youtube.com/watch?v=np_vyd7QlXk) - Matheus Battisti
 
 
 ### Flutter