zopflipng:tldr:5febb

This command is using the ZopfliPNG compression utility, which is a lossless image compression tool.

Here is a breakdown of the command:

• zopflipng: the command to execute the ZopfliPNG utility.
• --prefix=${prefix}: the --prefix option is used to specify a prefix for the output compressed images. ${prefix} is a placeholder that should be replaced with an actual prefix. For example, if ${prefix} is replaced with compressed-, the output filenames will have a prefix of compressed-.
• ${image1-png} ${image2-png} ${image3-png}: These are input image files that you want to compress. ${image1-png}, ${image2-png}, and ${image3-png} are placeholders for the actual file names. Replace them with the appropriate filenames.

So, this command will compress the specified input image files using ZopfliPNG, and the compressed images will have filenames with the given prefix.