Community created and supported Tvheadend packages for Synology and QNAP users are available from community package repositories. See below for more information:
https://synocommunity.com/package/tvheadend
https://www.myqnap.org/product/tvheadend
Please note that General support issues with Tvheadend are welcome in our forum but installation issues with these packages are best directed to NAS vendor forums.