Domoticz

Whitch version is best to install on a synology docker.

Domoticz official, Stable.

Where can i find this

Check this wiki page https://www.domoticz.com/wiki/Synology

Download a package from Jadahl

This is no longer available

Here you find it: https://hub.docker.com/r/domoticz/domoticz

Here there seems to be an alternative for jadahl drivers: https://www.reddit.com/r/synology/comme ... or_dsm_62/

Edit: I think this is a better new source for DSM 7: https://github.com/robertklep/dsm7-usb-serial-drivers

Edit2: I updated the wiki for this new source of USB drivers (7.x only)