Create an images directory in the root of your project:
images/
├── a.jpg
├── b.jpg
└── c.jpg
Then mount it to static/images in your site configuration.
[[module.mounts]]
source = 'static'
target = 'static'
[[module.mounts]]
source = 'images'
target = 'static/images'
Then reference the image in your markdown using an absolute (leading slash) path:
