Zalaare mediamonkey

Hi everybody! I have just started to use docker with my Synology. Currently I´m running IOBROKER and DECONZ.
I noticed that there is a container available for MediaMonkey but I don´t know how to install it properly.

Is there anybody who can help me?

I get this message : /usr/bin/mms.service: line 4: su: not found

Thank you for your support!