Just been reading up on this Docker thing. I think I understand it so bear with me. Has anyone "dockerized" NewzNab?

You probably mean Newznab+.

 

It could be done but it would need firstrun to checkout the code after you supply the password so its not as easy as most.

Has anyone had any success with this?

I've been running it via Dockers for months now. BUT, it's not a Docker. I installed svn onto unRAID natively to download and update Newznab and then run MariaDB and Apache dockers to use it. I log-in to the Apache Docker to run the update scripts. I have no interest in building an all-in-one docker due to the svn password requirements. I don't believe it really should be a single Docker since it would have to run MariaDB and Apache together. I would like to build a proper Apache Docker with the setup files properly outside of the Docker some day.

 

It works fine, but it's not simple and not for someone that can barely understand Docker beyond using the unRAID Docker templates.