Astro relative base path

package.json

{
...
  "scripts": {
    "dev": "astro dev",
    "start": "astro dev",
    "build": "astro build",
    "postbuild": "node ./postbuild.mjs -path ./",
    "preview": "astro preview",
    "astro": "astro"
  },
  ...
}

postbuild.mjs

import fs from "fs";
import path from "path";
import astroConfig from "./astro.config.mjs";

const PUBLIC_DIR = astroConfig.dist || "dist";
const argvs = process.argv.slice(2);

if ((argvs[0] === "--p" || argvs[0] === "-path") && argvs[1]) {
  let files = [];
  const extensions = [".html", ".css", ".js", ".json"];
  const PRODUCTION_URL = argvs[1];

  const replaceUrlsInFiles = function (dirPath, arrayOfFiles) {
    files = fs.readdirSync(dirPath);

    files.forEach(function (file) {
      const current = fs.statSync(dirPath + "/" + file);
      if (current.isDirectory()) {
        replaceUrlsInFiles(dirPath + "/" + file, arrayOfFiles);
      } else {
        const filePath = path.join(path.dirname(import.meta.url.replace(/file\:/, "")), dirPath, "/", file);
        if (extensions.includes(path.extname(filePath))) {
          let content = fs.readFileSync(filePath);

          content = String(content).replace(/src="\//g, `src="${PRODUCTION_URL}`);
          content = String(content).replace(/href="\//g, `href="${PRODUCTION_URL}`);
          content = String(content).replace(/url\("\//g, `url("${PRODUCTION_URL}`);

          content = String(content).replace(/src='\//g, `src='${PRODUCTION_URL}`);
          content = String(content).replace(/href='\//g, `href='${PRODUCTION_URL}`);
          content = String(content).replace(/url\('\//g, `url('${PRODUCTION_URL}`);

          fs.writeFileSync(filePath, content);
        }
      }
    });
  };

  //   if (PRODUCTION_URL && process.env.NODE_ENV === "production") {
  replaceUrlsInFiles(PUBLIC_DIR, files);
  //   } else {
  // console.log("skip postbuild");
  // process.exit(0);
  //   }
} else {
  console.error('please provide a path argument "-path", "--p"');
  process.exit(1);
}