Background
I'm working on a Python project and I'm using PyCharm as the IDE (pro version). It enables integrated use of Markdown, and I'm writing a readme.md file as well (github compatible, not sure about the exact flavour of Markdown but I reference this link https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet).
I wanted to embed an image and this works perfectly fine using Markdown. I can refer to the image using standard path syntax (e.g. if it's in the same working directory I just write):

Putting the image in another folder also works fine:

The question
The problem happens when I want to resize the image. If I understood correctly from this question, it is not possible to do this in plain Markdown, but HTML needs to be used: Changing image size in Markdown
This creates another problem. I cannot refer to the image except by using the full file-path!
I've created several copies of the image and put it in different folders to try and see whether anything of the following will work):
<img src="my_image.png" width="120" height="120">
<img src="../imgs/my_image.png" width="120" height="120">
<img src="./imgs/my_image.png" width="120" height="120">
<img src="./my_image.png" width="120" height="120">
The only option that works is writing the full path of the image, so:
<img src="/home/myUserName/MyProjects/ProjectName/imgs/etf_logo.png" width="120" height="120">
All other Stack overflow questions regarding HTML and relative imports are of no use to me since they are all addressing websites (which is logical) and refer to relative page paths, not folder paths.
How to set relative path to current folder?
Disclaimer: I'm not experienced in HTML and I don't "need" it for my project. I just wanted to resize the image without having to do this manually through image editing software.