For the past few months I've been building a platform for posting articles with tree-style comments out of the box. It is written in Golang, fully rendered server-side, has no tracking, works without JavaScript, supports GitHub Flavored Markdown, code is automatically highlighted when language is specified, has a light and a dark theme (right now only on browsers that support `prefers-color-scheme` CSS feature).
Feel free to check it out and drop a comment here!