import { Deno } from "https://deno.land/x/deno@v1.0.0/cli/js/lib.deno.ns.d.ts";
const { copyFile } = Deno;
Copies the contents and permissions of one file to another specified path, by default creating a new file if needed, else overwriting. Fails if target path is a directory or is unwritable.
await Deno.copyFile("from.txt", "to.txt");
Requires allow-read permission on fromPath.
Requires allow-write permission on toPath.