I did what I could man. I'm just one guy, a front-end guy even. I even made an announcement at the top of my GitHub readme looking for dev-ops or backend dev to help me make the self-hosting process better, but even with a project as popular as this, nobody came to help. So naturally I picked up as much I could myself and did it.
I honestly don't know how it can be made easier though. It's just a single service now, which needs to speak to other services. But if you still feel it's convoluted, fork the repo and help me make it better, teach me what good self-hosted apps are supposed to look like.
Reactive Resume https://github.com/AmruthPillai/Reactive-Resume
Disclaimer: I maintain the project :)