TO DETECT THE TEXT IN THE PDF FILE

1. Run yarn to install libs
2. Input files in the files.js
3. Change text to detect in the start.js

  // Detect text in the pdf file
  if (text.indexOf("Tên") >= 0) {
    console.log(url);
    fs.appendFileSync("result.txt", url + "\n");
    invalidUrls.push(url);
  }

4. Run yarn src/start.js the result will be written in the result.txt