Just following up for anyone who lands here… I just found a project on GitHub that will allow you to easily, and for free, put your Obsidian vault online:
Eleventy Garden : https://github.com/b3u/eleventy-garden
It has backlinks, bi-directional linking, and supports “[[ ]]” wiki links.
You’ll have to know how to use Node.js, the terminal, and Git to run your local setup so it’s obviously not a “1 click publish to web” solution. But it’s free, infinitely customizable, and available today.