got my fancy new nicolium-fe dockerfile + build process up and running on here. works swimmingly, easy to map custom stuff through via compose, and shit just Works (TM) which is pretty good. 10/10 do recommend this. I'll prob alter the dockerfile to just touch nicolium.json rather than requiring you copying it over during the build step, or just mv the example json to be the "default" one (since it's basically the default anyways).