R blogdown is not showing the figure

I am trying to add this picture below to my blog

It generates an html file like this:

However, when I run blogdown::serve_site, the actual website appears without figure like this below:

Can someone please suggest me a solution to fix this issue?

To include arbitrary files under the same directory as the Rmd file, you must use a leaf bundle. That is, your Rmd file must be named index.Rmd under a directory.

There exists an alternative way, but it's much less intuitive, which is the static/ folder.