content: homemade-joystick: embed gallery

README.md

@@ -11,3 +11,12 @@ zola serve
 ```
 zola build -o /path/to/generated/static/site
 ```
+
+## Including a gallery in a post
+
+* Use [YOGA](https://yoga.flozz.org/) to reduce the size of the pictures (JPEG 60%, 1600px max, is far enough for the
+  web!), and store the optimized images in `path/to/opti`.
+* Use `fgallery -s path/to/opti ./content/.../my-post/gallery`.
+* Replace the processed images as `YOGA` does a better job than `fgallery`:  
+  `rm my-post/gallery/imgs/* && cp path/to/opti/* my-post/gallery/imgs/`
+* Link it with `[link to gallery](./gallery/)` from the post in Markdown.