How to save ffmpeg.min.js so it doesn't have to be downloaded each time through index.html?

[Megatronicus]

How would I save this to a file to be referenced within the code so it doesn't need to be called and downloaded every time in index.html and would that be a good practice?
https://unpkg.com/@ffmpeg/ffmpeg@0.11.6/dist/ffmpeg.min.js