Test img into doc

assets/scss/common/_custom.scss

config/_default/hugo.toml

content/docs/reference/_index.md

content/docs/reference/example.md

content/docs/reference/img.png

content/docs/reference/img_1.png

hugo_stats.json

...ss/scss/app.scss_901a6e181e810c5c7347a10d84f037ab.content

.../scss/scss/app.scss_901a6e181e810c5c7347a10d84f037ab.json