function readFileimport { readFile } from "https://deno.land/x/gotenberg@0.4.0/mod.ts"; readFile(file: string, filename?): Promise<Asset>Helper to read a file (async) Parametersfile: stringPath to file optionalfilename = [UNSUPPORTED]filename passed to gotenberg ReturnsPromise<Asset>Asset that can be used in RequestInfo creatoren