I finally found a docker that works like i want.
I want to share my existed folder Musica , I do not want and empty /webdav folder inside my Music folder, I want to share my /Music folder and all his content/Files.
you need to edit to your needs this cocker-compose file:
Go to stack on portainer and deploy, must work, and you can see your shared folder and all files on it(www-dataww:
PD: I add the user 33 = www-data to group users to avoid permission problems