Quartz is an Open Source Static Site Generator built to publish Obsidian vaults to the web. It supports all the Obsidian Niceties out the box, including Obsidian-flavored Markdown.
It’s a TypeScript NodeJS project hosted here in GitHub. It is what My Notes are published to the web using. That is very much a work in progress as of this writing. It does not support Excalidraw or DrawIO out the box, but does support Mermaid (like Obsidian itself). I was on the fence about using those tools to begin with, so this was the straw that broke the drawing tool’s back.