how to update a docker image with custom packages?

[machineglow]

Hey Guys,

 

I'm migrating a homebridge VM to run in unraid docker app and I've discovered several tools and packages that don't come preinstalled on the official onzu/homebridge docker app.  I can log into to the console and install those packages manually but rebooting/restarting the app wipes out the changes.

 

I understand that the docker image probably needs to be updated with these packages but I don't really know how to do that.

 

Can someone guide me on this process?  do I somehow create  my own docker image based off of the official homebridge docker image?  I basically just need to install the dnsutils package and some additional python modules.  

 

Thanks,

Edited January 19 by machineglow

[machineglow]

Okay.. i figured it out.   

 

There's a startup.sh script in the /homebridge directory that i can add the package installation commands in.  

 

Hope that helps anyone else reading this.