Yeah I think the difference between the preview and the actual render is the biggest headache, as the preview also allows html.

Also can't seem to get it to work on my post: https://hashnode.com/post/dockerizing-modern-web-apps-cjmkefy36020zqws2y5u8f1q5 Seems like images behave different between preview and published as well, as my trick with the img tag didn't work after hitting publish.

Strange, in the preview there were all aligned to the left 🤔

So far the way I found is to use <img src="" style="display: block; margin: 0 auto;" /> for images instead of markdown notation  .