QR code component with CSS and HTML

I have not found difficulties by the way I learnt how to use git pages and I familiarized with frontend mentor process. I had a problem with the img tag in particular with the src attribute: when I used:

<img src="../qr-code-component/images/image-qr-code.png" alt="qr code">

It worked online But at the very beginning, i used this path:

<img src="/images/image-qr-code.png" alt="qr code">

Look at the path! It was a bit different. It was working with the Local "Live server" function of VS code, so I said great! but not working online in the github pages. (Not working means that the image did not show up).

Why do i have to change the path and write in that way to make it work online too?