feat: use random port by default (#10)

Author: ryuapp

src/md-to-pdf.ts

@@ -1,5 +1,5 @@
 import { launch } from "@astral/astral";
-import { DEFAULT_PORT, launchHttpServer } from "./utils/server.ts";
+import { launchHttpServer } from "./utils/server.ts";
 import type { MdToPdfOptions } from "./types.ts";
 
 /**
@@ -20,7 +20,7 @@ export async function mdToPdf(
   const server = launchHttpServer(path, options);
 
   const browser = await launch();
-  const page = await browser.newPage(`http://localhost:${DEFAULT_PORT}`);
+  const page = await browser.newPage(`http://localhost:${server.addr.port}`);
   const pdf = await page.pdf();
 
   // Close the browser and the server

src/utils/server.ts

@@ -5,8 +5,6 @@ import { extract } from "@std/front-matter/yaml";
 import { parse } from "@std/yaml/parse";
 import { join } from "@std/path";
 
-export const DEFAULT_PORT = 33433;
-
 await initMd4w("small");
 
 /**
@@ -71,7 +69,7 @@ export function launchHttpServer(
     return notFound();
   };
 
-  return Deno.serve({ onListen: () => "", port: DEFAULT_PORT }, handler);
+  return Deno.serve({ onListen: () => "", port: 0 }, handler);
 }
 
 /**