K8s does not deal with CI/CD of your source code, nor can it automagically package your code out of the box. You need to compile your source and bundle it in the form of a docker image, host it and provide access to K8s to pull it. K8s is like Linux kernel, it's not usable for most people unless you package it with GNU utilies and other components people expect out of a distro.

Sort of yes, for personal projects and small business I would go for something like this or dokku and try to split services as much as I can, rather than managing k8s in my own