How to add image in Jekyll

To insert image in the blog we can simply use

![AltText](/path/to/img.jpg)

However, if we need to adjust the size of the picture, you can use html tag

<img src="/old_blog/assets/img/test.jpg" width="50%" alt="AltText" />

Also, you can use the mix style:

![AltText](/old_blog/assets/img/test.jpg){:width="70%"}