Hello, glad you like it! I am a relative Docker noob and not familiar with Kubernetes so unfortunately I'm not sure I can provide you with a solid answer.
The app was originally designed for a smaller scale monolithic deployment. I wasn't even running it in Docker originally but created the container after demand for it. After that I learned Docker and moved my whole lab to Docker containers but haven't dabbled in Kubernetes yet.
I'm not entirely sure what you mean by 404s though. If something is broken I can definitely try to fix that if you can provide steps on how to reproduce the issue.