demonstrate links to image file

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mixed with jekyll liquid syntax.

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markdown syntax. relative reference

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{: width="250"}markdown relative link syntax with jekyll liquid for size definition.

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<img src="{{ site.baseurl }}{% link assets/images/dolphin.jpg %}" width=300/>html image syntax with jekyll liquid variables.

⚠️ Do not put the images and files in
_postsfolder. The relative links to static files (other than markdown file) do not works in github pages!