This util helps you download assets from a remote source to your local filesystem. We, at Pinelab, use it primarily to download transformed and optimized assets from Vendure and Directus for our static sites.
For use with Astro JS, you would use /public/ instead of /static/:
With Astro, the copying of files from public to dist happens before the JS build, so you need to manually copy the downloaded files to dist after build: npm run build && cp -r public/* dist/