Can you add WebDav as standard for stacks and to also add the master user to the WebDav group (usermod -aG davfs2 <username>)
Can you add WebDav as standard (it's a common used service) for stacks and to also add the master user to the WebDav group (usermod -aG davfs2 <username>) this will allow the master user to setup mounts ect...
Reason for suggestion is a well known service called BrickFTP, so this link gives you an idea at the bottom:
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DMG Digital
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