Adding Agents to Plex Server on QNAP NAS

I am interested in adding some additional agents to my Plex Media Server on a QNAP TVS-871. Are there instruction or FAQ’s available? I found instructions for MAC and Windows, but could not find anything on NAS server.

I have The Movie Database and Movie Poster.db-I am missing information on several titles in my collection

Thanks

There is an excellent FAQ in here: https://forums.plex.tv/categories/qnap/p1#top