I started looking into open-source CMS systems because I wanted to redo my own website.
I came over the system called Strapi. It is based on Javascript and runs on Node.JS
The main reason I like this system is because of the easy content manager UI, custom content models, a powerful REST and GraphQL API and is super Developer friendly.
I have made a website called NorgesLan and is currently recoding it using Strapi as a CMS system.