fix: download the browser in advance (#16)

Author: ryuapp

src/cli.ts

@@ -24,6 +24,7 @@ import {
 import { mdToPdf } from "./md-to-pdf.ts";
 import { getFilename } from "./utils/filename.ts";
 import type { MdToPdfOptions } from "./types.ts";
+import { getBinary } from "@astral/astral";
 
 function printHelp(): void {
   const help = `md2pdf: ${
@@ -89,6 +90,10 @@ if (args._) {
   }
 }
 
+// Prepare browser
+// If the browser is not installed, download it
+await getBinary("chrome");
+
 if (paths.length < 1) {
   const exitCode = args._.length ? 1 : 0;
   if (exitCode) {