Added .gitocnfig file

dotfiles/.gitconfig

+[filter "lfs"]
+	process = git-lfs filter-process
+	required = true
+	clean = git-lfs clean -- %f
+	smudge = git-lfs smudge -- %f
+[user]
+	name = Andres Montano
+	email = andres.montano@tecnalia.com
+[credential]
+	helper = cache --timeout=3600