import { Deno } from "https://deno.land/x/deno@v0.28.0/cli/js/lib.deno_runtime.d.ts";
const { readFile } = Deno;
Read the entire contents of a file.
const decoder = new TextDecoder("utf-8");
const data = await Deno.readFile("hello.txt");
console.log(decoder.decode(data));