adding git command help

DEVELOP.md

@@ -64,4 +64,16 @@ Once the JAR file is built, you can run it using
 ### Using git
 
 - Using command line: https://git-scm.com/doc
-- Using IDE: https://www.jetbrains.com/help/idea/using-git-integration.html
+- Using IDE: https://www.jetbrains.com/help/idea/using-git-integration.html
+
+
+Commands using `git` command line tool:
+ - `git checkout -b prueba2`
+ - dev changes
+ - `git add .`
+ - `git commit -m '#1 my user story'`
+ - `git push -u origin/prueba2`
+ - otros cambios
+ - `git add .`
+ - `git commit -m '#1 other changes'`
+ - `git push`