How to add only one extra image into only one md file?

I try to insert one extra image (and add a copyright line) in the middle of only one of my pages.

The image lives here: static/images/stories/story17.jpg
The md file lives here: content/english/stories/story17.md

I created story17.md in Typora and added this html code

<img src="/images/stories/story17.jpg" class="img-fluid float-left mr-5 mb-5" />

But I got only “image load failed”. What am I doing wrong?

From Typora’s main menu choose Format > Image > Use Image Root Path and then select the static directory as the root path. In the future, please visit https://support.typora.io/ for help with Typora.