Docker and adding custom packages

[chrispazz]

Hello, I am trying to go from a hardware install to a docker install.

If I use domoticz/domoticz:latest I can have domoticz up and running correctly.
But I need a couple of plugins that needs custom packages installed (apt-get install xxxxx).

Which is the correct way to personalize my dockerfile so that if a new release is published in main docker domoticz, I can update without having to reinstall extra packages by hand each time?

Thank you

[chrispazz]

I resolved using a custom Dockerfile derivating from official docker image!

[GJKNL]

Please could you explain more specific? I would like to use a Conbeell with deConz and Domoticz in docker on Synology Nas. Domoticz in docker runs fine with Z-wave and rfx. But how to add deConz?